I was looking forward to test you game, I saw you streaming during the development!
And I'm not disappointed :D! You managed to make a complex and deep game, yet simple, following the "1 button" theme of the jam.
I liked the mix of your sprites and pico-8 symbols, it looks nice. The SFX are nice too!
I just have a small bug at the end of the fight, I can't restart the game (either if I win or lose), I have to refresh the page.
Also, have you considered changing the Movepool during the fight? After a certain time or number of uses of a single ability?