Bullet Hell 100 is a free danmaku game developed by Makoto Yanagisawa for Android. As the name suggests, it is a bullet-hell shooter game that consists of 100 stages and two modes. The game is designed to be challenging and fast-paced, with players having to dodge a barrage of bullets while trying to defeat the enemies.

The game features a variety of unique enemies, each with their own attack patterns and abilities. Players can choose between two modes: Normal and Hard. In Normal mode, players will face a challenging but manageable difficulty level, while Hard mode will test even the most skilled players. The game's graphics are simple yet effective, with bright colors and smooth animations that add to the overall experience.

Overall, Bullet Hell 100 is an enjoyable game for fans of the bullet-hell shooter genre. With its challenging gameplay, unique enemies, and two modes, players will find themselves coming back for more. Best of all, it's completely free to play, making it a great choice for anyone looking for a fun and challenging game to pass the time.