One of the few people who actually finished the game. Glad you liked the puzzles
My main inspiration was classic zelda, so that is to be expected. I spent the 80% of time in designing and developing things/mechanics, and was not able to implement more puzzles/enemies. Got a lesson there! And about the coin, that’s a secret. I suggest you to explore the first room (THE first room, with only two switches, more specifically the switch that does nothing)