this is a really polished and good game! i love it! the audio is fun, killing enemies is satisfying, upgrades are satisfying, powerups are satisfying, the visuals are good, did i mention ITS SO POLISHEDDD? i enjoyed this experience thoroughly! even if i only played briefly.
i think there's not much criticism i can give, but i did pick up on a few things. most of this is just what you could update to be honest.
i think that there should be more enemy variety, don't get me wrong i only got to like 50k rpm. but i think more enemies could make it more interesting. i don't feel the difficulty scales very well when you learn the games mechanics.
more upgrades! i think adding more upgrades could be nice.
i think that if you make the spinner spin faster and with an aura it could be quite nice! it gives more visual candy to the player.
i like the worldbuilding but it could be nice to add more obstacles and things that are a threat to the player in the world itself. this could be anything from like rolling balls to a big spinny thing!
overall i liked it, it has a theme and it runs with it very well.