Great platformer game! The one-button control scheme was quite a fun challenge and I’m glad you made it.
I think the 1 coin I missed was in the bottom-left of the map; it seemed like it was stuck into the ground. Any tips on how to get it, if you don’t mind spoiling me a bit? :P
Excited to see more from you!
Edit: Also, noticed an invisible floor above and to the right of the final flag.