It was a nice game to pick up and play for 15 minutes or so. I'm a fan of simple hack and slashes like this. The music was good as were the sprites.
The bottle smash sound was a bit old by the end but not horrible at all. I love the idea of the strength boost when you're on low health.
A few complaints, though. Comboing anything without a wall around was impossible, since swinging the guitar basically ruined all momentum you have. The jumps felt extremely high, but not bad at all.
It might've also just been me but I found the control scheme a bit odd. Using the arrow keys with the spacebar but not the up key felt a bit odd.
Overall, given the time frame it was made in, it's a pretty good game. With a bit of QoL and mechanic adjustment it'd be great