The lack of clear instructions made the game confusing: I hadn't realised that the mechanics were linked to the theme of each level; I presumed at first that the speed change was a bug!  Also, is the player meant to be able to walk straight though the first level without jumping?

However, given the limitations that Chris mentions, this is a well-realised game idea.  Nice use of music.  

This is nice and simple way of implementing the emotions theme and has been realised really well.  It is a shame that you had a reduced group in the second day as I am sure you could have got more content in there.  I love the way the mechanics change in each level to reflect the emotion.

Nice little game, I particularly liked the character animation although when jumping a another animation other than walk would have been nice. Good use of sound and interesting levels