Great job with the smooth game play! The tripleshot was a nice touch; felt really satisfying to line up next to the enemy, land all 3 shots, and hear the krk-krk-krk. The animated sinking was cool too!
Proximity based AI was well implemented. Gameplay was intuitive, though I think it would have been even better with a deeper gameplay loop (e.g. upgrades, or tougher enemies).
Nonetheless, solid submission!