Nice game! The intro is really really nice, and it's very uncommon in game jams with such small scope. In my first playthrough I thought I had to keep my anger to the minimum level, but that ended my game in the middle of the level. On the second run I discovered that you could fly, and that you had to keep a balance with anger. I also initially thought that you had to punch the walls to go through. Perhaps punching could help adding some anger, or add some punchable items for that. 

I ended up finding all coins (I think) and making it to the exit!