Great time waster that can either be casual or competitive. Both graphics and sound is decent, but might not appeal to people, srring that not everyone likes pixel art and retro music, and there are a few avatars like character skins that I would prefer an improvement. That being said, it is done very well and stays true to its own style. The gameplay is what makes this shine. Roguelike bullethell with quite a few mechanics and playstyles, not only characters have different strategics, but weapons with unique behaviour and random buff builds lead to thousands of possibilities: you could become God, or you could have your worst day yet. Rarely do you see games like this these day, which is what I personally seek.
And even though some might not take interest into games that require high focus, this is truly a gem that you should consider picking up whenever you have some free time to spare. The game is also free with some unlockable characters and skins for them.
And since Chillyroom made this, expect some wackyness coming your way. Better if you understand Chinese.
All in all, a great game that although not for everyone, but will definitely appeal to either who seek some challenge, or just wanna enjoy utter mayhem.