First off, I see a cutscene in a game jam and I'm in. I liked the dash mechanic and the wall jump mechanic. I noticed that if I were to fall of a ledge I only had one jump which was good but in my game I gave the player access to all jumps so they could make it through difficult terrain so I had trouble deprogramming myself.
The wall jump worked very well mechanically and the level complimented it by provided areas that could only be completed with the level mechanic. Also the fact that you worked in the theme to the story was an awesome touch.
Also I noticed there wasn't a really a point to collecting the coins as they didn't really do anything.