great idea. it probably the most "practical" game ive seen like something i might play outside of playing games for the jam. an UNDO button would be the most perfect mechanic for this style of game. maybe just make it the z key. maybe a skip block button too? that might be too much
I had that on my jam todo list! But I didn't put it in, because I didn't know how to limit it (still don't know really) and I had the feeling unlimited undo would somehow cross the treshhold of it being no challenge at all and would ultimately make the game boring. And thanks for the nice words!