This is great! ^^ I think with some very minor tweaks this could be an amazing game, you already have the levels and the atmosphere is great, the animations and audio are great too!
One easy fix I think might help would just be no insta deaths on falling into water maybe? ,':\ also those long wait times on moving platforms to come back, maybe when the gap is long make the platform stop at each end, and you can walk on it again to go back over. Solid entry for a jam I really enjoyed playing! :)