5 files changed, 15 insertions, 12 deletions
diff --git a/engine/interfaces/Action.ts b/engine/interfaces/Action.ts
index 61c89e1..f0e6a66 100644
--- a/engine/interfaces/Action.ts
+++ b/engine/interfaces/Action.ts
@@ -1,5 +1,5 @@
 export enum Action {
   MOVE_LEFT,
   MOVE_RIGHT,
-  JUMP,
+  JUMP
 }
diff --git a/engine/interfaces/Direction.ts b/engine/interfaces/Direction.ts
index 0bc6ef3..af1c7ac 100644
--- a/engine/interfaces/Direction.ts
+++ b/engine/interfaces/Direction.ts
@@ -1,6 +1,6 @@
 export enum Direction {
-  UP = "UP",
-  DOWN = "DOWN",
-  LEFT = "LEFT",
-  RIGHT = "RIGHT",
+  UP = 'UP',
+  DOWN = 'DOWN',
+  LEFT = 'LEFT',
+  RIGHT = 'RIGHT'
 }
diff --git a/engine/interfaces/Draw.ts b/engine/interfaces/Draw.ts
index 6561a01..8479fe4 100644
--- a/engine/interfaces/Draw.ts
+++ b/engine/interfaces/Draw.ts
@@ -1,4 +1,4 @@
-import type { Coord2D, Dimension2D } from "./";
+import type { Coord2D, Dimension2D } from './';
 
 export interface DrawArgs {
   center: Coord2D;
diff --git a/engine/interfaces/Vec2.ts b/engine/interfaces/Vec2.ts
index b2bae37..04be4be 100644
--- a/engine/interfaces/Vec2.ts
+++ b/engine/interfaces/Vec2.ts
@@ -9,8 +9,11 @@ export interface Dimension2D {
 }
 
 export interface Velocity2D {
-  dx: number;
-  dy: number;
+  dCartesian: {
+    dx: number;
+    dy: number;
+  };
+  dTheta: number;
 }
 
 export interface Force2D {
diff --git a/engine/interfaces/index.ts b/engine/interfaces/index.ts
index 8cdf4d8..c2f6896 100644
--- a/engine/interfaces/index.ts
+++ b/engine/interfaces/index.ts
@@ -1,4 +1,4 @@
-export * from "./Vec2";
-export * from "./Draw";
-export * from "./Direction";
-export * from "./Action";
+export * from './Vec2';
+export * from './Draw';
+export * from './Direction';
+export * from './Action';