Finished most of the levels - the controls are a bit hard to use since most platformers of this type use a two-hand on keyboard format (arrow keys + z/x), maybe it was designed for controllers?
Either way, the double jump mechanic is slightly un-intuitive at the start but after getting used to it, the fast motion is satisfying and I can see potential when the art/juice is fleshed out more.
the double ball level seems almost impossible to me, not sure if it's meant to be beaten lol