A good shooter :D
While not a long game - Chaos Field is a good game to pick up of any fan of the shooting genre, and the challenge of "bullet hell" type bosses. There are three ships to choose from with different ranges / strengths of attacks - and levels are composed of what would be mini-bosses and boss battles. No swarms of enemies to mow through to collect your power-ups, your source of power comes from... well - staying alive! It has pretty good graphics and a very excellent soundtrack - so while this game is at a discounted price, I'd try to pick it up. There is a huge learning curve though, because this game starts out hard to begin with. Be prepared for a challenge!