I liked it!
dont have much feedback other than i would like more upgrades and that the hitbox for picking up exp feels a bit small. hitbox for taking damage feels good but making it a bit more convenient for the player would be nice too. also maybe highlighiing the shop would be nice, didnt get how to upgrade at first.
edit: i refreshed the window and i got a bunch of other upgrades, first time i only could choose between the same 3