Give *Inkstakill* a try; it’s my third game and clearly inspired by *Ultrakill*, but with some changes that I think are pretty novel. From what I’ve seen so far, most people weren't fans of the first level, but I highly recommend checking out the second and third ones—they address the complaints about the parkour and turn the gameplay into a really interesting bullet hell. (Not to mention the incredible boss fight in the third level!)
By the way, feel free to share your own games so I can try them out too! :D