No wonder you got an A for this. It has at least a couple of really nice ideas and overall it looks great, apart from maybe the lack of sounds. When you die, you leave the "body" where you died and so that's used in the gameplay. It's a more relaxed game in a way that your lives aren't limited, but instead they're just counted. Other interesting feature is the physics related to the cube's movement, the cube just rotates around its edges, which means that while it's a bit challenging at first, it can also be used in some parts.
I'd like to invite your game to our contest, the Game Development World Championship!