Very good controls. It feels very nice to play.
I felt a spike in difficulty at level 3 and level 4 I had to stop because I couldn't do it.
adding some coyote time would help with making it more easy.
But some easier level design would also work.
my biggest tip: let other people play-test your game and watch what they do and when they get stuck.
This is good looking and good feeling platformer. So keep on the good work.