Coding - day two

School has started so it's less free time now. I think I've already done most of what I'd planned, so only minor changes today.

This version was submitted as the first final, just in case. There still are some things to be added, though, and the biggest one is sound. I can't play any of the instruments well enough, so the music will probably be some random music keyboard sounds. Anyway, some music is needed.

There still are some things to be decided on, like for example the "zero chimneys", chimneys whose "power" is 0. Leave them, or delete them?

Still thinking about some features to add, but don't actually know, what else might be improving the gameplay.