Nice game.

1, There should be a sound for when the player touches another bubble.

I really like the metaball effect. I would be very happy if you would play my game.

Cool concept and mechanic, but it did take me a few rounds to figure out what I had to do. It was fun while there were a plentiful amount of bubbles to eat, but once you near the end it really drops. Having either a "win" screen with a count of how many bubbles are left or just making them infinitely spawn would help with that. The controls were also difficult. 

But otherwise, a neat idea and use of the limitation

Keep eating bubbles to Win

Remember  ..

Eat only those smaller than you

Strange decision to place dash on the right mouse button instead of left.

Cool bubble merging mechanics and strange but interesting controls.

Interesting concept but I think it will be good to have a small description what player must do, because it's not so obvious. And maybe it was only my personal problem but sometimes bubbles have an almost same size and it's difficult to understand which one is bigger.

But I like the idea, I remembered the first stage of the game Spore :)