The movement felt awesome! I loved the simplistic art style, and the music was relaxing. The game when I opened it looked like "Thomas Was Alone". The player block felt squishy, and fun. The intro/tutorial was awesome. And like b3agz said " Has a good difficulty curve about it". The game was just awesome. Their are two very minor things I did not like about your game: (1) The transitions between scenes were not that nice it felt very jerky (Maybe have like a scene wipe or something) (2) I figured out that I could hit space and wall slide long before the tutorial told me I could. These two things are very minor and just my opinion. Overall strong entry, fantastic job, and keep it up!
EDIT: The game was very one-bitish.