Ah! I was wondering if anyone would ask about the controls. Part of the reason is that I felt as though if I went with WASD or arrow keys, people would end up trying to turn left due to muscle memory: every other game of this sort allows it, so I wanted something substantially different so players wouldn't have a finger hovering over a useless key out of habit. As to why "A" and "M" specifically, I type on a Dvorak keyboard and those are the two keys that are positioned the same as on a QWERTY keyboard.