Grid Assault is an arena shooter that happens to be a fine clone of Geometry Wars. Shoot stuff, collect upgrades and survive for 6 minutes… Really solid game!
From the Homepage:
Grid Assault is a faithful clone of Geometry Wars: Retro Evolved from the Xbox360.
Try to stay alive Robotron style, while you are attacked by hundreds of enemies.
The game features neon-like vector graphics, custom music, dazzling particles, full 360 degrees movement and fire directions and FAST gameplay! It is best to play the game with a dual analog gamepad, but keyboard/mouse controls are provided.
NOTE: The game is timed and will stop after 6 minutes of gameplay.
Link to Gameplay Video (Pixel Prospector)