Trisub

This is a casual top-down game where you control a submarine in the shape of an isosceles triangle as it plummets through a deep-sea trench. Your goal is to go as deep as possible without crashing. You can control the shape of your triangle: you can make it sharper so it can pass through narrow places, but the sharper it is, the faster down it goes, so it's best to keep it a little obtuse.