I like the idea that you get rid of curse that removes your buffs. And then you are left normal all right after a curse (but the buffs didn't return).
I like the minimalistic art choice because it's simmilar to aim trainers. This game could become an aim trainer.
Tips: You could make a projectile of attacks so there is more clarity on what is going on.
The timer that counts down your life could be placed somewhere else, where it doesnt obstruct view.
You could make an endless mode! That way the game would become increasingly more and more challenging.
Things that should be implemented: Restart feature (it didn't work for me), music