diff --git a/src/GUI.ts b/src/GUI.ts
index 23a5c95..63fcce8 100644
--- a/src/GUI.ts
+++ b/src/GUI.ts
@@ -49,6 +49,7 @@ class GUIController {
         if (!this.listeners.has(event)) {
             this.listeners.set(event, []);
         }
+        // biome-ignore lint/style/noNonNullAssertion: guaranteed by .has() check above
         this.listeners.get(event)!.push(handler);
     }
 
diff --git a/src/__tests__/constants.test.ts b/src/__tests__/constants.test.ts
index dae213d..ba24b87 100644
--- a/src/__tests__/constants.test.ts
+++ b/src/__tests__/constants.test.ts
@@ -53,7 +53,7 @@ describe("cell metadata bit layout", () => {
             (terrain << TERRAIN_TYPE_SHIFT) +
             (quality << FOOD_QUALITY_SHIFT);
 
-        expect(packed & 1).toBe(food);
+        expect((packed >> CELL_FOOD_BIT) & 1).toBe(food);
         expect((packed >> CELL_HOME_BIT) & 1).toBe(home);
         expect((packed >> CELL_OBSTACLE_BIT) & 1).toBe(obstacle);
         expect((packed >> TERRAIN_TYPE_SHIFT) & TERRAIN_TYPE_MASK).toBe(
diff --git a/src/scenes/AntsComputeScene.ts b/src/scenes/AntsComputeScene.ts
index aacb5c5..7e66a63 100644
--- a/src/scenes/AntsComputeScene.ts
+++ b/src/scenes/AntsComputeScene.ts
@@ -51,7 +51,7 @@ export default class AntsComputeScene extends AbstractScene {
         this.material.needsUpdate = true;
     }
 
-    public resize(width: number, height: number) {}
+    public resize(_width: number, _height: number) {}
 
     public update() {
         this.material.uniforms.uTime.value = performance.now();
diff --git a/src/scenes/AntsDiscretizeScene.ts b/src/scenes/AntsDiscretizeScene.ts
index db4fcd0..6b38fc3 100644
--- a/src/scenes/AntsDiscretizeScene.ts
+++ b/src/scenes/AntsDiscretizeScene.ts
@@ -49,7 +49,7 @@ export default class AntsDiscretizeScene extends AbstractScene {
         this.createMesh();
     }
 
-    public resize(width: number, height: number) {}
+    public resize(_width: number, _height: number) {}
 
     public update() {}
 }
diff --git a/src/scenes/DrawScene.ts b/src/scenes/DrawScene.ts
index 92a5ec2..41ded5d 100644
--- a/src/scenes/DrawScene.ts
+++ b/src/scenes/DrawScene.ts
@@ -37,7 +37,7 @@ export default class DrawScene extends AbstractScene {
         this.material.needsUpdate = true;
     }
 
-    public resize(width: number, height: number) {}
+    public resize(_width: number, _height: number) {}
 
     public update() {}
 }
diff --git a/src/scenes/ScreenScene.ts b/src/scenes/ScreenScene.ts
index 6964814..dd17972 100644
--- a/src/scenes/ScreenScene.ts
+++ b/src/scenes/ScreenScene.ts
@@ -126,11 +126,11 @@ export default class ScreenScene extends AbstractScene {
             }
         });
 
-        this.renderer.canvas.addEventListener("pointerup", (e) => {
+        this.renderer.canvas.addEventListener("pointerup", () => {
             this.isPointerDown = false;
         });
 
-        this.renderer.canvas.addEventListener("pointerleave", (e) => {
+        this.renderer.canvas.addEventListener("pointerleave", () => {
             this.isPointerDown = false;
         });
 
@@ -161,7 +161,7 @@ export default class ScreenScene extends AbstractScene {
             }
         });
 
-        window.addEventListener("keyup", (e) => {
+        window.addEventListener("keyup", () => {
             this.drawMode = PointerState.None;
         });
     }
diff --git a/src/scenes/WorldBlurScene.ts b/src/scenes/WorldBlurScene.ts
index 068a026..3b319a3 100644
--- a/src/scenes/WorldBlurScene.ts
+++ b/src/scenes/WorldBlurScene.ts
@@ -34,7 +34,7 @@ export default class WorldBlurScene extends AbstractScene {
         this.material.needsUpdate = true;
     }
 
-    public resize(width: number, height: number) {}
+    public resize(_width: number, _height: number) {}
 
     public update() {}
 }
diff --git a/src/scenes/WorldComputeScene.ts b/src/scenes/WorldComputeScene.ts
index b390cbc..83109a2 100644
--- a/src/scenes/WorldComputeScene.ts
+++ b/src/scenes/WorldComputeScene.ts
@@ -35,7 +35,7 @@ export default class WorldComputeScene extends AbstractScene {
         this.material.needsUpdate = true;
     }
 
-    public resize(width: number, height: number) {}
+    public resize(_width: number, _height: number) {}
 
     public update() {}
 }