This game is VERY nice looking, and super cool that you focused on javascript to make it happen!
I gotta be honest though, the game speed is SUPER fast and difficult to keep up with, so I ended up dying a lot since I couldn't dodge the projectiles and overshot my jumps quite a bit.
I'd love to give this another go if you keep iterating on it, it's a fun concept and it looks fantastic - I can tell you put a lot of work into this and I hope you had fun making it! 😊