Cool game! I didn't understand some of the stuff that I could buy. Like a red ring flying around me doing seemingly nothing? Didn't feel like I had time to read at the shop either :D
I think some damage cooldown would have been nice. It felt like as soon anything got close, I died after hearing a drumroll of taking-damage-sounds.
The music slider turned itself down to 0 all the time. Was there some more music than the bass beat of the sword?
I had a little hard to read stuff in the menu because there was so much going on with the cool background. Maybe the background could have had less bright colors, to let the text stand out more!
Impressive submission, well done!