I really loved the art, the sound effects and the concept! Also you have well met the theme. The problem is that I couldn't move out of the first block. It's too difficult and you jump not high enough. I think you could have used wider spaces with less obstacles. Making the game too hard stops the players from continuing. I think you could make a great game with this prototype!
Moreover, if you want to continue to develop the game I would like to have a nice music theme. Do you want a help with that for free? I am a sound designer.