Hey! I think I actually just got stuck! Am I missing something?
I've done it! Nice that you have the save function so I could restart the room. (Didn't much like that I solved some of puzzles by jumping into the void, though, so again my position was reset but the blocks weren't.) Otherwise fabulous!
Glad you were able to get out! I will be fixing this bug in an upcoming patch (the current block should be destroyed if you place any new block on a wall or on the exiting block, etc.).
Just wanted to let you know a patch has been released that should prevent you getting stuck like this again. :)