This was excellent!
Fantastic game feel, can tell this was polished thoroughly and with care.
The attention to detail was good too, with the subtle changes to the character sprite scale as he jumps.
Really liked the artstyle, and animations too (especially the player spawning one :D).
Thought it was a bit hard with a single hitpoint for the player, but that was probably a conscious design choice and I'm just bad at it haha.
Also the user interface with volume sliders was much appreciated and is good practice for game development.