diff --git a/src/data/collision/body.ts b/src/data/collision/body.ts
index 11676df..fbada22 100644
--- a/src/data/collision/body.ts
+++ b/src/data/collision/body.ts
@@ -1,3 +1,4 @@
+import { PhysicsBody } from ".";
 import { CollisionMask } from "./collisionMask";
 
 // Random value that determines how much gravity a body must receive before something is considered a collision with the ground/ceiling
@@ -22,7 +23,7 @@ interface Config {
   roundness?: number;
 }
 
-export class Body {
+export class Body implements PhysicsBody {
   public active = 1;
 
   private xVelocity = 0;
diff --git a/src/data/collision/index.ts b/src/data/collision/index.ts
new file mode 100644
index 0000000..2859afd
--- /dev/null
+++ b/src/data/collision/index.ts
@@ -0,0 +1,5 @@
+export interface PhysicsBody {
+  addVelocity(x: number, y: number): void;
+  addAngularVelocity(power: number, direction: number): void;
+  tick(dt: number): boolean;
+}
diff --git a/src/data/collision/simpleBody.ts b/src/data/collision/simpleBody.ts
index 104160d..07e4e0f 100644
--- a/src/data/collision/simpleBody.ts
+++ b/src/data/collision/simpleBody.ts
@@ -1,3 +1,4 @@
+import { PhysicsBody } from ".";
 import { CollisionMask } from "./collisionMask";
 
 const GRAVITY = 0.3;
@@ -12,7 +13,7 @@ interface Config {
   onCollide?: (x: number, y: number) => void;
 }
 
-export class SimpleBody {
+export class SimpleBody implements PhysicsBody {
   private xVelocity = 0;
   private yVelocity = 0;
 
@@ -105,6 +106,8 @@ export class SimpleBody {
     ) {
       this.onCollide(xCollision || x, yCollision || y);
     }
+
+    return true;
   }
 
   get velocity() {