It was really fun !
The controls are really tight, the level design is good. Overall, the game just feels right. I played the non updated version and the fact that the path is marked was sometimes a bit counter intuitive (like in the first or second level I was bit lost at first when you have to go get the token). The double jump mechanic was a bit obscure at first too.
The difficulty mechanic is a bit rough. I think that's how you implemented it : the more you die, the harder the game. It's was a frustrating. Once you get the hang of it, it's not that bad tho.
The thing that annoyed me the most was jumping in tight spots, I felt like sometimes the jump was a bit too powerfull to really control where you want to go.
But overall it is a great entry ! Congratulations !