You probably still do changes, but here's my feedback. I didn't finish it, sorry:
- one sudden enemy with a different AI is a bit breaking expectations of a player. If You want one to behave differently, make it with another color.
- the world is very big, and checkpoints are a bit rare. It would be fun to have something do do in it while You figure out where to go. For example, a power up which lets You spend coins for temporary speedup would be awesome. You probably may want to do something with it, but I can only judge what I see.
- Why all of a sudden a text box "its too heavy"? I think the big box is memorable enough, You don't have to stop the game there.
- Ladder has few bugs, for example jumping from it is cancelled by climbing.
- Leap of faith above spikes is something that is rarely liked by players:/
Overall, a bit WIP, but looks very nice, the animations looks cool, and the fact that each biome has different music is very nice. Keep it up!