This is amazing!

The third dimension in the house!!! This was awesome. The movement felt fluid and polished. I wanted to cruise in that toy boat and eat that banana so bad. Excellent entry. The ability is great, but perhaps you can add even more differentiation between being large and small other than your size (movement shifts or new abilities for each mode or something more than using it to squeeze between tight spaces).

But already this was really fun to mess around with and I can imagine you have some interesting puzzles in store for us. Great work.

nice abilty !

This was a fun ability, I can see this being a game.

way too little visibility, but the concept it great!

What a great game, the jumping is a bit whacky but still good.

Who would'nt want to have this power? Great demo, you've made a solid start for an interesting game!

I really like it! I'm looking forward how you can develop this with level design. 
Btw. I agree with Pens_nPixels that the crouching kinda feels redundant when you are already shrunken.

I like the concept and I'm interested what kind of levels you will make

Honey, I shrank. Nah, it's okay, I got big again.

I can see the potential in this, even if I think the 'crouch' is a little redundant; you're telling me I shrank once, then have to do something else to get through a small gap? Other than that and a craving for inverted Y-looking, I like where this could be headed.