Been playing this game for a few minutes, and I had to congratulate your work, as I can clearly see how good this game is!
The idea of using the ENTIRE SCREEN as a map is flat out genius, and something we've rarely even seen before, which is a shame.
The last time game I saw which used multiple windows as a mechanic so effectively was OneShot, which used it for the end-game puzzle.
Last but not the least, I can't help but feel like this game has great potential to be able to modded, although I don't know if this is possible to do with Godot Engine.
Also had the idea to make myself a soundtrack for the game, or at least try.