Minubeat
I've been loving Cactus Software's simple, rapidly developed games, each one packaged with a neat conceptual hook and minimalist presentation. However, their new game, Minubeat, is too much for me. The concept this time is a shmup that you play to the beat of the music. You can move freely with the cursor keys, but you shoot to the beat. And, well, I can't survive more than a few seconds. Maybe that's the point, as Cactus explain:
The game is a rhythm shmup, you have to use bomb and defense in sync with the beat! Press Z to shoot normally. X for homing bombs, C to clear screen from bullets. You have one minute to beat the game, that's how short it is. Will probably take you a while, though. Made in 12 hours.