K.O.L.M hasn't been converted to Ruffle, but I hope it does someday. It's been about 10 years since I first played it and even though I didn't remember the name, the experience still stuck with me. It's basically a Metroidvania taken to the logical conclusion. You start off with literally nothing, not even working eyes, and by the end you become literally invincible. The story might be a little predictable, but it's told in a fun way. Definitely an underrated gem.
