Lots of love and care went into the visual polish here! The water textures look phenomenal. The transitions are well-crafted, and all of the sprite-work is top-notch.
It seemed like the main strategy was: eat weaker flies to penetrate the shields of stronger flies. Is there a point where the game evolves beyond order-of-operations puzzles?
The title made me crack up - that's a really good-quality pun. Very cute and original!