You are testing an experimental space fighter. Its weapon is powerful, but prone to overheating. You can only fire it once every 10 seconds.
Long Shot is an endless bullet hell game, created in 72 hours for Ludum Dare 51. Survive for as long as you can against an onslaught of randomized enemy waves, dodging bullets and shooting back when you can, and aim for the high score.
Controls are explained in-game, under "Instructions".