OH one other thing, it might be worth considering adding a simple pause menu (even if it's just the options "Continue" and "Quit"). I hit escape at one point and was pretty bummed out that it started me back at the beginning.
Yeah. I had a simple pause menu, but it was being fussy, and I try to be as minimalistic as possible with any UI. But you're not the only one to encounter the "muscle memory" escape problem. Even I have done it! I'll try to reimplement the pause menu in the next update.