Really nice game, took me back to my Gameboy Advance days :D
The art is really nice for most of the game, and I'm assuming the platforms etc are untextured due to a lack of time, so I'll not be harsh on the rating :)
At first I was going to complain about the controls as I started using the WASD keys for moving, only to realise that W doesn't jump :\, also attack was X under the movements keys which was a tad inconvenient, but then I reliased the tutorial showed the arrow keys, not the WASD ones, so my bad. 2 ways to improve the player misunderstanding is to either stop A & D from moving the player, or allow WASD keys to fully work like the arrow keys.
Regarding the level, I wasn't sure why the platform started going up in the sky when the terrain looked really nice, maybe it would have been obvious if the art was in place, but I kind of felt lot.
Finally the witch fight felt a bit unfiar as I was unable to see how much I had damaged the witch. Also the fallig spikes were damaging me even though they didn't hit me, maybe the colliders were too large resulting in false positives.
Overall, it is a nice game and I'd be up for playing a more polished version, for sure :)