diff --git a/frontend/src/index.ts b/frontend/src/index.ts
index ac666fe..048e364 100644
--- a/frontend/src/index.ts
+++ b/frontend/src/index.ts
@@ -25,14 +25,16 @@ const testSDF = () => {
   return -res;
 
   */
-    let min = 1000;
+    /*let min = 1000;
     for (const t of objects) {
       min = Math.min(min, t.distance(position));
     }
     if (min < 0) {
       // min = Math.min(min, vec2.distance(position, vec2.fromValues(40, 80 - 31.62)) - 31.62);
     }
-    return -min;
+    return -min;*/
+
+    return -vec2.distance(position, vec2.fromValues(40, 40)) + 30;
   };
 
   const width = 80;
@@ -55,11 +57,12 @@ const testSDF = () => {
       const position = vec2.fromValues(x, y);
       const redIndex = y * (width * 4) + x * 4;
       const dist = getPixelValue(position);
-      if (Math.abs(dist) < 1) {
-        const blueIndex = y * (width * 4) + x * 4 + 2;
+      if (Math.abs(dist) < 1.5) {
         zeroes.push(position);
-        imageData.data[blueIndex] = 255;
       }
+      const blueIndex = y * (width * 4) + x * 4 + 2;
+      //imageData.data[blueIndex] = dist * 10;
+
       imageData.data[redIndex + 3] = 255;
     }
   }
@@ -75,25 +78,37 @@ const testSDF = () => {
       const position = vec2.fromValues(x, y);
       const dist = getPixelValue(position);
 
-      const nearestDist =
-        zeroes.find((z) => Math.abs(vec2.distance(z, position) - dist) < 0.5)?.length > 0;
-      if (nearestDist) {
+      const realDistance = zeroes.map((z) => vec2.distance(z, position)).sort()[0];
+
+      if (Math.abs(realDistance - dist) < 3) {
         const greenIndex = y * (width * 4) + x * 4 + 1;
         imageData.data[greenIndex] = 255;
       } else if (dist >= 0) {
         const redIndex = y * (width * 4) + x * 4;
-        errors.push(dist);
+        errors.push(realDistance - dist);
         imageData.data[redIndex] = 255;
       }
+
+      /*if (zeroes.find((z) => vec2.distance(z, position) < dist) !== undefined) {
+        const blueIndex = y * (width * 4) + x * 4 + 2;
+        imageData.data[blueIndex] = 255;
+      }*/
     }
   }
 
+  zeroes.forEach((z) => {
+    const blueIndex = z.y * (width * 4) + z.x * 4 + 2;
+    imageData.data[blueIndex] = 255;
+    imageData.data[blueIndex - 1] = 255;
+    imageData.data[blueIndex - 2] = 255;
+  });
+
   console.log(errors);
 
   ctx.putImageData(imageData, 0, 0);
 };
 
-// testSDF();
+//testSDF();
 // extract as new image (data-uri)
 
 /*
@@ -113,10 +128,14 @@ tree.print();
 console.log(tree.findIntersecting(new BoundingBox(960, 1050, 50, 190, 'G')));
 */
 
-try {
-  Random.seed = 42;
-  new Game();
-} catch (e) {
-  console.error(e);
-  alert(e);
-}
+const main = async () => {
+  try {
+    Random.seed = 42;
+    await new Game().start();
+  } catch (e) {
+    console.error(e);
+    alert(e);
+  }
+};
+
+main();
diff --git a/frontend/src/scripts/drawing/graphics-library/compiling/check-program.ts b/frontend/src/scripts/drawing/graphics-library/compiling/check-program.ts
new file mode 100644
index 0000000..b750771
--- /dev/null
+++ b/frontend/src/scripts/drawing/graphics-library/compiling/check-program.ts
@@ -0,0 +1,13 @@
+import { checkShader } from './check-shader';
+
+export const checkProgram = (gl: WebGL2RenderingContext, program: WebGLProgram) => {
+  const success = gl.getProgramParameter(program, gl.LINK_STATUS);
+
+  if (!success) {
+    gl.getAttachedShaders(program).forEach((s) => {
+      checkShader(gl, s);
+    });
+
+    throw new Error(gl.getProgramInfoLog(program));
+  }
+};
diff --git a/frontend/src/scripts/drawing/graphics-library/compiling/check-shader.ts b/frontend/src/scripts/drawing/graphics-library/compiling/check-shader.ts
new file mode 100644
index 0000000..0608e06
--- /dev/null
+++ b/frontend/src/scripts/drawing/graphics-library/compiling/check-shader.ts
@@ -0,0 +1,7 @@
+export const checkShader = (gl: WebGL2RenderingContext, shader: WebGLShader) => {
+  const success = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
+
+  if (!success) {
+    throw new Error(gl.getShaderInfoLog(shader));
+  }
+};
diff --git a/frontend/src/scripts/drawing/graphics-library/compiling/create-program.ts b/frontend/src/scripts/drawing/graphics-library/compiling/create-program.ts
new file mode 100644
index 0000000..790178c
--- /dev/null
+++ b/frontend/src/scripts/drawing/graphics-library/compiling/create-program.ts
@@ -0,0 +1,44 @@
+import { waitWhileFalse } from '../../../helper/wait-for';
+import { tryEnableExtension } from '../helper/enable-extension';
+import { checkProgram } from './check-program';
+import { createShader } from './create-shader';
+
+export const createProgram = async (
+  gl: WebGL2RenderingContext,
+  vertexShaderSource: string,
+  fragmentShaderSource: string,
+  substitutions: { [name: string]: string }
+): Promise<WebGLProgram> => {
+  const program = gl.createProgram();
+
+  const extension = tryEnableExtension(gl, 'KHR_parallel_shader_compile');
+
+  const vertexShader = createShader(
+    gl,
+    gl.VERTEX_SHADER,
+    vertexShaderSource,
+    substitutions
+  );
+  gl.attachShader(program, vertexShader);
+
+  const fragmentShader = createShader(
+    gl,
+    gl.FRAGMENT_SHADER,
+    fragmentShaderSource,
+    substitutions
+  );
+  gl.attachShader(program, fragmentShader);
+
+  gl.linkProgram(program);
+
+  if (extension) {
+    const checkCompileStatus = () =>
+      gl.getProgramParameter(program, extension.COMPLETION_STATUS_KHR);
+
+    await waitWhileFalse(checkCompileStatus);
+  }
+
+  checkProgram(gl, program);
+
+  return program;
+};
diff --git a/frontend/src/scripts/drawing/graphics-library/helper/create-shader.ts b/frontend/src/scripts/drawing/graphics-library/compiling/create-shader.ts
similarity index 57%
rename from frontend/src/scripts/drawing/graphics-library/helper/create-shader.ts
rename to frontend/src/scripts/drawing/graphics-library/compiling/create-shader.ts
index 0c6901f..5de03c2 100644
--- a/frontend/src/scripts/drawing/graphics-library/helper/create-shader.ts
+++ b/frontend/src/scripts/drawing/graphics-library/compiling/create-shader.ts
@@ -1,26 +1,17 @@
-import { settings } from '../../settings';
-
 export const createShader = (
   gl: WebGL2RenderingContext,
   type: GLenum,
   source: string,
   substitutions: { [name: string]: string }
 ): WebGLShader => {
-  const allSubstitutions = { ...settings.shaderMacros, ...substitutions };
-
   source = source.replace(/{(.+)}/gm, (_, name: string): string => {
-    const value = allSubstitutions[name];
+    const value = substitutions[name];
     return Number.isInteger(value) ? `${value}.0` : value;
   });
 
   const shader = gl.createShader(type);
   gl.shaderSource(shader, source);
   gl.compileShader(shader);
-  const success = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
-
-  if (!success) {
-    throw new Error(gl.getShaderInfoLog(shader));
-  }
 
   return shader;
 };
diff --git a/frontend/src/scripts/drawing/graphics-library/helper/enable-extension.ts b/frontend/src/scripts/drawing/graphics-library/helper/enable-extension.ts
index 6989983..23e51c9 100644
--- a/frontend/src/scripts/drawing/graphics-library/helper/enable-extension.ts
+++ b/frontend/src/scripts/drawing/graphics-library/helper/enable-extension.ts
@@ -1,7 +1,29 @@
+const extensions: Map<string, any> = new Map();
+
+export const tryEnableExtension = (
+  gl: WebGL2RenderingContext,
+  name: string
+): any | null => {
+  if (extensions.has(name)) {
+    return extensions.get(name);
+  }
+
+  let extension = null;
+  if (gl.getSupportedExtensions().indexOf(name) != -1) {
+    extension = gl.getExtension(name);
+  }
+
+  extensions.set(name, extension);
+
+  return extension;
+};
+
 export const enableExtension = (gl: WebGL2RenderingContext, name: string): any => {
-  if (gl.getSupportedExtensions().indexOf(name) == -1) {
+  const extension = tryEnableExtension(gl, name);
+
+  if (extension === null) {
     throw new Error(`Unsupported extension ${name}`);
   }
 
-  return gl.getExtension(name);
+  return extension;
 };
diff --git a/frontend/src/scripts/drawing/graphics-library/program/fragment-shader-only-program.ts b/frontend/src/scripts/drawing/graphics-library/program/fragment-shader-only-program.ts
index beba0b9..05701d4 100644
--- a/frontend/src/scripts/drawing/graphics-library/program/fragment-shader-only-program.ts
+++ b/frontend/src/scripts/drawing/graphics-library/program/fragment-shader-only-program.ts
@@ -5,10 +5,14 @@ export class FragmentShaderOnlyProgram extends Program {
 
   constructor(
     gl: WebGL2RenderingContext,
-    shaderSources: [string, string],
+    sources: [string, string],
     substitutions: { [name: string]: string }
   ) {
-    super(gl, shaderSources, substitutions);
+    super(gl, sources, substitutions);
+  }
+
+  public async initialize(): Promise<void> {
+    await super.initialize();
     this.prepareScreenQuad('vertexPosition');
   }
 
diff --git a/frontend/src/scripts/drawing/graphics-library/program/i-program.ts b/frontend/src/scripts/drawing/graphics-library/program/i-program.ts
index 086026a..2eec3b7 100644
--- a/frontend/src/scripts/drawing/graphics-library/program/i-program.ts
+++ b/frontend/src/scripts/drawing/graphics-library/program/i-program.ts
@@ -1,6 +1,7 @@
 import { vec2 } from 'gl-matrix';
 
 export interface IProgram {
+  initialize(): Promise<void>;
   setDrawingRectangle(bottomLeft: vec2, size: vec2): void;
   bindAndSetUniforms(values: { [name: string]: any }): void;
   draw(): void;
diff --git a/frontend/src/scripts/drawing/graphics-library/program/program.ts b/frontend/src/scripts/drawing/graphics-library/program/program.ts
index a657b2a..ca5bd9d 100644
--- a/frontend/src/scripts/drawing/graphics-library/program/program.ts
+++ b/frontend/src/scripts/drawing/graphics-library/program/program.ts
@@ -1,17 +1,14 @@
 import { mat2d, vec2 } from 'gl-matrix';
-import { createShader } from '../helper/create-shader';
+import { settings } from '../../settings';
+import { createProgram } from '../compiling/create-program';
 import { loadUniform } from '../helper/load-uniform';
 import { IProgram } from './i-program';
 
 export default abstract class Program implements IProgram {
   protected program: WebGLProgram;
-
-  private shaders: Array<WebGLShader> = [];
-
+  private programPromise: Promise<WebGLProgram>;
   private modelTransform = mat2d.identity(mat2d.create());
-
   private readonly ndcToUv: mat2d;
-
   private uniforms: Array<{
     name: Array<string>;
     location: WebGLUniformLocation;
@@ -23,13 +20,24 @@ export default abstract class Program implements IProgram {
     [vertexShaderSource, fragmentShaderSource]: [string, string],
     substitutions: { [name: string]: string }
   ) {
-    this.createProgram(vertexShaderSource, fragmentShaderSource, substitutions);
-    this.queryUniforms();
+    substitutions = { ...settings.shaderMacros, ...substitutions };
+
+    this.programPromise = createProgram(
+      this.gl,
+      vertexShaderSource,
+      fragmentShaderSource,
+      substitutions
+    );
 
     this.ndcToUv = mat2d.fromScaling(mat2d.create(), vec2.fromValues(0.5, 0.5));
     mat2d.translate(this.ndcToUv, this.ndcToUv, vec2.fromValues(1, 1));
   }
 
+  public async initialize(): Promise<void> {
+    this.program = await this.programPromise;
+    this.queryUniforms();
+  }
+
   public bindAndSetUniforms(values: { [name: string]: any }) {
     this.bind();
     this.setUniforms({ modelTransform: this.modelTransform, ...values });
@@ -56,7 +64,7 @@ export default abstract class Program implements IProgram {
   }
 
   public delete() {
-    this.shaders.forEach((s) => this.gl.deleteShader(s));
+    this.gl.getAttachedShaders(this.program).forEach((s) => this.gl.deleteShader(s));
     this.gl.deleteProgram(this.program);
   }
 
@@ -91,38 +99,4 @@ export default abstract class Program implements IProgram {
       return u1;
     });
   }
-
-  private createProgram(
-    passthroughVertexShaderSource: string,
-    fragmentShaderSource: string,
-    substitutions: { [name: string]: string }
-  ) {
-    this.program = this.gl.createProgram();
-
-    const vertexShader = createShader(
-      this.gl,
-      this.gl.VERTEX_SHADER,
-      passthroughVertexShaderSource,
-      substitutions
-    );
-    this.gl.attachShader(this.program, vertexShader);
-    this.shaders.push(vertexShader);
-
-    const fragmentShader = createShader(
-      this.gl,
-      this.gl.FRAGMENT_SHADER,
-      fragmentShaderSource,
-      substitutions
-    );
-    this.gl.attachShader(this.program, fragmentShader);
-    this.shaders.push(fragmentShader);
-
-    this.gl.linkProgram(this.program);
-
-    const success = this.gl.getProgramParameter(this.program, this.gl.LINK_STATUS);
-
-    if (!success) {
-      throw new Error(this.gl.getProgramInfoLog(this.program));
-    }
-  }
 }
diff --git a/frontend/src/scripts/drawing/graphics-library/program/uniform-array-autoscaling-program.ts b/frontend/src/scripts/drawing/graphics-library/program/uniform-array-autoscaling-program.ts
index bbb6cb0..0e26a4c 100644
--- a/frontend/src/scripts/drawing/graphics-library/program/uniform-array-autoscaling-program.ts
+++ b/frontend/src/scripts/drawing/graphics-library/program/uniform-array-autoscaling-program.ts
@@ -28,6 +28,10 @@ export class UniformArrayAutoScalingProgram implements IProgram {
     }
   }
 
+  public async initialize(): Promise<void> {
+    await Promise.all(this.programs.map((p) => p.program.initialize()));
+  }
+
   public bindAndSetUniforms(uniforms: { [name: string]: any }): void {
     const values = this.descriptors.map((d) =>
       uniforms[d.uniformName] ? uniforms[d.uniformName].length : 0
diff --git a/frontend/src/scripts/drawing/i-renderer.ts b/frontend/src/scripts/drawing/i-renderer.ts
index ed666c8..fa6c0d8 100644
--- a/frontend/src/scripts/drawing/i-renderer.ts
+++ b/frontend/src/scripts/drawing/i-renderer.ts
@@ -4,6 +4,8 @@ import { IDrawable } from './drawables/i-drawable';
 import { ILight } from './drawables/lights/i-light';
 
 export interface IRenderer {
+  initialize(): Promise<void>;
+
   startFrame(deltaTime: DOMHighResTimeStamp): void;
   finishFrame(): void;
 
diff --git a/frontend/src/scripts/drawing/rendering/rendering-pass.ts b/frontend/src/scripts/drawing/rendering/rendering-pass.ts
index 671059d..de03fa2 100644
--- a/frontend/src/scripts/drawing/rendering/rendering-pass.ts
+++ b/frontend/src/scripts/drawing/rendering/rendering-pass.ts
@@ -24,6 +24,10 @@ export class RenderingPass {
     );
   }
 
+  public async initialize(): Promise<void> {
+    await this.program.initialize();
+  }
+
   public addDrawable(drawable: IDrawable) {
     this.drawables.push(drawable);
   }
diff --git a/frontend/src/scripts/drawing/rendering/webgl2-renderer.ts b/frontend/src/scripts/drawing/rendering/webgl2-renderer.ts
index ef9a3a9..feb75a9 100644
--- a/frontend/src/scripts/drawing/rendering/webgl2-renderer.ts
+++ b/frontend/src/scripts/drawing/rendering/webgl2-renderer.ts
@@ -36,6 +36,8 @@ export class WebGl2Renderer implements IRenderer {
   private lightingPass: RenderingPass;
   private autoscaler: FpsAutoscaler;
 
+  private initializePromise: Promise<[void, void]> = null;
+
   private matrices: {
     distanceScreenToWorld?: mat2d;
     worldToDistanceUV?: mat2d;
@@ -63,6 +65,11 @@ export class WebGl2Renderer implements IRenderer {
       this.lightingFrameBuffer
     );
 
+    this.initializePromise = Promise.all([
+      this.distancePass.initialize(),
+      this.lightingPass.initialize(),
+    ]);
+
     this.autoscaler = new FpsAutoscaler([
       this.lightingFrameBuffer,
       this.distanceFieldFrameBuffer,
@@ -75,6 +82,10 @@ export class WebGl2Renderer implements IRenderer {
     }
   }
 
+  public async initialize(): Promise<void> {
+    await this.initializePromise;
+  }
+
   public drawShape(shape: IDrawable) {
     this.distancePass.addDrawable(shape);
   }
diff --git a/frontend/src/scripts/drawing/settings.ts b/frontend/src/scripts/drawing/settings.ts
index 9ddc82d..f5db8a7 100644
--- a/frontend/src/scripts/drawing/settings.ts
+++ b/frontend/src/scripts/drawing/settings.ts
@@ -8,11 +8,11 @@ export const settings = {
       [0.2, 0.1],
       [0.6, 0.1],
       [1, 1],
-      [1.25, 0.75],
+      /*[1.25, 0.75],
       [1.5, 1],
       [1.75, 1.25],
       //[1.75, 1.75],
-      //[2, 2],
+      //[2, 2],*/
     ],
     startingTargetIndex: 2,
     scalingOptions: {
diff --git a/frontend/src/scripts/game.ts b/frontend/src/scripts/game.ts
index 43bf3ed..d3664a7 100644
--- a/frontend/src/scripts/game.ts
+++ b/frontend/src/scripts/game.ts
@@ -29,6 +29,7 @@ export class Game implements IGame {
   private infoText = new InfoText();
   private character: Character;
   private renderer: IRenderer;
+  private initializeRendererPromise: Promise<void>;
 
   constructor() {
     const canvas: HTMLCanvasElement = document.querySelector('canvas#main');
@@ -46,10 +47,13 @@ export class Game implements IGame {
     );
 
     this.renderer = new WebGl2Renderer(canvas, overlay);
-
+    this.initializeRendererPromise = this.renderer.initialize();
     this.initializeScene();
     this.physics.start();
+  }
 
+  public async start(): Promise<void> {
+    await this.initializeRendererPromise;
     requestAnimationFrame(this.gameLoop.bind(this));
   }
 
diff --git a/frontend/src/scripts/helper/wait-for.ts b/frontend/src/scripts/helper/wait-for.ts
new file mode 100644
index 0000000..1e0f708
--- /dev/null
+++ b/frontend/src/scripts/helper/wait-for.ts
@@ -0,0 +1,29 @@
+export const waitWhileFalse = (body: () => boolean): Promise<void> => {
+  let resolveOnDone: () => void;
+  let rejectOnDone: (e: Error) => void;
+
+  const onDone = new Promise<void>((resolve, reject) => {
+    resolveOnDone = resolve;
+    rejectOnDone = reject;
+  });
+
+  const waiter = () => {
+    let success: boolean;
+
+    try {
+      success = body();
+    } catch (e) {
+      rejectOnDone(e);
+      return;
+    }
+
+    if (success) {
+      resolveOnDone();
+    } else {
+      requestAnimationFrame(waiter);
+    }
+  };
+
+  waiter();
+  return onDone;
+};
diff --git a/frontend/src/scripts/helper/wait.ts b/frontend/src/scripts/helper/wait.ts
new file mode 100644
index 0000000..73dd2c2
--- /dev/null
+++ b/frontend/src/scripts/helper/wait.ts
@@ -0,0 +1,3 @@
+export const wait = (ms: number): Promise<void> => {
+  return new Promise<void>((resolve, _) => setTimeout(resolve, ms));
+};