New Look and Possibilities

This update marks the start of the new look. There's no longer a blue menu, but rather another piece of paper for the HUD. This marks the first of a handful of changes to be more sketch-themed.

I've also prevented the combination of bombs that is impossible to get through. I'd like to revisit the spawn system as a whole to optimize it, but that'll be a lot more difficult. I'll continue looking at ways to improve performance.