Great idea! It was really fun to play :)

For your first game this is pretty well fleshed out!  You don't have many sounds, but you did a good job making sure the common actions have sounds and they're juicy!

For your next one, if you make a game that has jumping I'd look into adding some jump input buffering and coyote time!  This game doesn't have them and I didn't find that to be a problem, but including them early and often will really help you get some good feeling characters.

Awesome job!

Nice job on your game!  I loved how you change your size to make it through different parts.  The character is really cute too!  

Holy crap, for your first game this is really good. I really like the starting animation too.  Keep up the good work!