Gravity Cubes

This game functions entirely with gravity. You (the white cube) move around by changing your gravity using W (gravity goes up), A (gravity goes left), S (gravity goes down), D (gravity goes right).

Your goal is to push the cubes to their respective goal, which has the same color and shape as the cube. The gravity of the cubes are all pointed in a different direction; red (circle) falls up, blue (diamond) falls to the right, green (triangle) falls down and yellow (hexagon) falls to the left. 

I made this game for a school project to test out mechanics. There is a bunch of things that could be done better, but the main functionality is there.