Very fun game, I enjoyed it a lot!
I might have encountered a bug in the game (Web version, Chrome 99.0.4828.0): On the last level (“T” in “flucTuoid”), on the second stage toward the very end when you have to jump between the two horizontal flames over a chasm to get to the end, I had fallen into the chasm and ended up stuck beneath the map and couldn’t die. I had to refresh the page and, thankfully, continue again from the beginning of the “T” level in order to keep on playing.