Press space. Of course I'm not going to tell you what it does, figure it out yourself :P (there's a very helpful button labeled "see inside") Run it in turbo mode, it might give you seizures xP
I've really been making too many games... Weirdly enough, the idea for this came from a game I'd thought of making, I was trying to make a realistic background for it (I mean, what kind of a person likes a plain ol' blue background?) and when the conventional way of creating a background (designing the actual sprite) didn't work, I thought I could use pen to create the smooth transitions, like from day to night because I didn't feel like creating 100 sprite costumes. That didn't work, but halfway I got the idea for this project. Just saying, I created this in approx. 10 minutes, so please report any bugs or things like that in the comments.