You might like Mullet MadJack too, if you like frantic shooters with a “keep killing or die” element.

Completely different style, and no customization that I know of, it’s 90’s cyberpunk anime styled. Each level you have ten seconds until your heart stops. Each kill gets you more time, and flashier kills like melee finishers get you more, as in universe your doing some sort of livestream death game. At the end of each short level, in roguelike fashion, you get to pick one of a few randomly selected upgrades/powerups.

Look up some footage on youtube, it’s a lot cooler in motion than words can cover. But it’s definitely one to play with mouse and keyboard so you can do twitch movements fast.