The core mechanic is kinda interesting and fun, however the controls are a bit counter to how fast you have to play to keep up.
Maybe some auto targeting, whenever you click one of the limbs it will do damage to a random enemy if you have not selected anything.
Would have loved a "chill" non-combat encounter like a shop, where you can sell limbs or something, or a campfire to restore health to all limbs and allow for some rearranging of limbs.
I can see this being a interesting little indie game, well done.