SPEED² is a multidirectional collider! Your size, color, and enemies are relative to your speed! When you are not in motion, you become invisible and invulnerable. So if an object is blue it means it is slower and safe to absorb. If it is red then the object is faster and you should evade it. If the object is yellow then it is matching your speed and you will bounce off of each other. The bottom right counter counts up to the release of the Boss. Boss Hint: It can't hurt you if you're slower.
My main game goal was to create a game with only arrow keys as the controls and speed and collision as main mechanics.