I couldn't get past the start menu. I could move the mouse cursor but that's it. I pressed space and tried a controller too. I'm sure I missed something basic... :(I love the art though.
Did you try clicking start?
Oh, for whatever reason the start button is far to the left of the start game text. But after the start menu everything lined up.
Gotchu, I think it's a known bug that things are odd on non-16:9 monitors! Mine is a 21:9 monitor, so I have the same problem.
Glad you liked the art! :)