Ultimate Crab Battle

You control a small ship, moving it with the arrow keys to avoid incoming fire. Your goal is to defeat a single, massive enemy crab. You hold down the shoot button to fire a constant stream of projectiles at it. The crab fills most of the screen and attacks with patterned bullet spreads you must weave through. The fight is a steady endurance test, a loop of dodging and shooting until its health bar finally empties. The game feels like a concentrated burst of that classic boss rush tension.