the art is really nice! i like the music and especially like that the boss has a different theme from the main theme, i haven't seen that frequently in this game jam so that's a nice touch. the gameplay is nice too, i had fun and played a few times.
onto criticism, i think that there could be more to the gameworld. it's a bit bland right now and maybe some clouds and touching up could help it a lot.
i feel like a dash cooldown was very much needed, i was able to complete the game just by spamming dash.
the timer for rounds should be more prominently displayed to the player imo, i lost track of time a few times and clicked on an upgrade on accident.
it would be nice if upgrades were shown on a sidebar or something. at least like the total stat changes y'know?
the theme could be a bit more present in my opinion, theres some spinning stuff but its not a core mechanic IMO. that doesn't make it bad though and it's a good game despite that.
overall i think this is very charming and actually a bit addictive lol.