This was a neat little platform game, nice job!
I played the browser version and it worked well. It got harder and very hectic quite quickly, I could have done with a little bit of a more gradual challenge. I started with the tutorial but found that it was fairly tedious and introduced way to many concepts far too quickly, so I bounced and didn't come back for a couple of days. I then started the actual game and discovered that the tutorial was largely unnecessary, it has a story element and introduces at least the first power-up in a good way... so I'd just skip the tutorial altogether and add hints into the game itself... including basic controls. Making the game the tutorial has the advantage that you don't overload the player with stuff they can't relate to just yet, and the basic jumping and running around of this game is standard enough that you don't actually need a tutorial to start playing the first level.
The graphics look good, although possibly a little... disconnected? Like nice sprites that don't quite gel into a cohesive whole. And the loading screen dragon looks quite different, not as detailed. But overall it looks nice, and controls decently, and the power ups feels like they enhance the game since it plays quite differently while you have them. The sounds effects work well, but the music though... it is fairly harsh and gets very repetitive very quickly. Not a fan.
I did enjoy my time with this game until the music (and lack of time) forced me out, keep going with this!