I'm really glad you enjoyed it! I've seen the issue about skipping levels so in the last two I tried to enforce the shooting mechanic a bit more, especially by adding the boss fight which requires the use of the rewind mechanic, although I'm not sure how well it actually worked. The background was a problem I knew about - I thought it looked kind of cool but a lot of people have mentioned it so on the newgrounds release I have locked the camera to not go above / below it :D Thanks for all the feedback, I'll definitely try to check out your game if I get the chance :)