Difficult platformers are totally my jam (sorry) and this one is executed very well, so it's easily one of my favorite submissions!
The difficulty curve was way off for me personally, with the cannon level taking me many, many tries while I managed most others without a single death, but I like how you introduced something new with each level and it all felt very tight and fair. Also, great choice of background music for maintaining a chill vibe.
Really nice work, I'd totally pay for a longer version of this with more levels!