I like the story that comes with the game, and the wall running/climbing is a feature that was added nicely.
My biggest problem comes with the boss fight, if there is a health bar that indicates how many hits are needed in order to defeat it, then progress would be possible to check on that level.
I also managed to fly somehow in the first level, only to land on a goblin when i stopped jumping, which was quite funny, and I could only make it happen once.
Overall though, good game :)