This is fun. I've liked this kind of thing ever since trying the Quake 2 SIRD mod. Is there source available? I'd like to try tinkering with the algorithm.
The returning arrow killing enemies is badass, but I wonder if it would make more sense as a boomerang? I died before getting to buy upgrades so I don't know much about that.
I might be missing something but I only found the one donut and seems like leaving the play area from any direction causes death. Also, when in ROT mode, more visual feedback about your rotation would be nice. (Seems like it's mostly just one pixel in the lower-left.)
I love the way this uses the theme twice (only one bullet, and only one axis). Game seems alright, but it desperately needs to allow retrying a level without replaying all the earlier levels too.
