Really cool!
The limited rerolls made me think before using them, as I didn't want to waste them. It could be interesting if the reroll bar regenerated over time, or if there was a dice roll option which regenerates rerolls - once my reroll bar was empty, the rest of the battle was almost entirely down to RNG (the only choice left to me was which enemy to attack.)
I could definitely see this becoming a full game! The gameplay is fun, and the art and music are both really lovely too! A very charming, retro feel. Fantastic job. 😄