Very nice music and audio design on the bubble popping and the natural underwater muffling.
The spike level was very difficult. That being said the cute visual aspect of it paired with how difficult this game can be makes it all the more frustrating.
Something that I would add is a more noticeable indication of where the 'force' was coming from, maybe a cursor icon or animation surrounding the cursor to better indicate how the bubbles are going to react to the mouse.
Nice game.