Thank you, I'm glad you enjoyed it! I'm definitely thinking of developing it further!
There is a reset, you press R, it tells you that in the first level, but nowhere else, so it's easy to go unnoticed. One change I'd definitely make you be adding a controls screen so you can check that at any point. (If pressing R didn't work somewhere, do you mind telling what level(s) that took place so i can fix it in the future?)