I really like this genre of game, I've spent a lot of time in Archero and Vampire survivors. Unfortunately it's just a little too unpolished in it's current state. The balance is off and the character is too tall. But with some polish on the game feel you've got something really promising here. It's just a shame it's quite derivative.
I'm surprised I'm getting performance issues because the game itself is quite simple visually. It also took a very long time to load which is unusual for a browser game, I thought perhaps it was broken.