Music annoying for me. Gameplay well-balanced, but for me coins collecting mechanic is useless and annoying. 

Good job! I like the coin mechanics and the "biome" transitions, from a cave, to a sort of forest, to the end goal of the castle!

nice element of variety with the coin collecting! I also appreciate you taking the time to set up checkpoints

I liked the progression system, nice job!

Very fun! Best design of all the ones i've seen so far and good level of difficulty. This is a winner for me :)