Control your Squabble with the mouse. It might be hard to see at first.
Use left mouse button to push squabbles with your squabble. When your squabble is alone the game will close. Use right mouse button if you get bored or feel lonely.
Reminds me quite a bit of my first LD48 game, Bactarium. I couldn't quite tell if the left-click action was working or not. My only problem with this game is that if you switch focus to another app, the mouse is still constrained within the region occupied by the game window. You should probably fix that somehow, so that it doesn't hijack the mouse from other apps. Great job on the bubble sound effects, by the way.
They made a pretty circle: http://imgur.com/X2gwrTj !
The mouse lock is a bit aggresive, maybe you can let the player unfocus with Escape?