The visuals and music is great!
One problem I had was the start, I was quite confused on what to do the first few times of trying the game out and kept dying. The controls although all there, don’t really explain what they do so I have knowledge of controls but no idea how to use said knowledge. I also initially didn’t know that left click was a melee attack, nor that spacebar slowed down the movement. Some tooltips you can hover over, or text to explain what they do would be great!
A problem I found also was the empty room before the 3 chests, for some reason, my frame rate dropped upon entering that empty room, and it carried forward to the chest room. I’m not sure why, but I tried it on multiple browsers (chrome, firefox etc.) and it was all laggy. I was using the default settings, with the background being the flat color background.