It was a good game. I felt like it would have been nice if the fake platforms vanish after you jumped on them , but that might take away from the game. I like the music, and it would have been great if the music played even after you died because It is kinda a bop. And more sound effects. You could use BFXR or https://sfbgames.itch.io/chiptone. There is this place too, https://freesound.org/ Just make sure that you can use there particular license in your game. They have stuff about that in there faq. Good Luck