Hey Man I was testing out your game and got this crash! I tried to jump and shoot arrow!
also it seems like you may not have pixel perfect collision with the floor (I realized when I jumped on the wooden floor on the left or right.)
Also the transition is a bit sudden and also no indicator on what to do so its actually confusing.
if your making in Game Maker I could probably help in a few things.
Also I have a demo of a game I'm making live if you don't mind checking it out and leaving feed back :
also may I ask where you got the tile set from?