Very nice innovative game. I also got stuck in one of the later levels. Maybe a soundtrack would be nice and also to know in advance which one is the next piece to do some planning.
Nice puzzle game with a wonderful layout, unfortunately is a bit difficult to understand that you need a mouse to play. Is it possible to play without mouse? The page should contain some more instructions on the game,
Thanks ,@Lost Gremlin and @1111Someone11, for the comments. I just saw now this line in the rules "Mouse controls are only allowed if you are interacting with a simulated keypad on-screen." :(