Good start. English explaination (of powerups) woud be nice. And please change the key setup. I'm using a QWERTZ keyboard so ZX is a fingerbreaking combination!
This is actually a great comment. Although this is obvious to me, it suddenly came to mind that the game benefits from shorter endgames. So, I did just that: once you almost complete your path, the final piece appears in the first few nexts "by magic". Feature fixed! Don't tell anyone though. ;) Please have another try, y'all!
Thank you for your feedback. The upgrade shop is a very good idea.