I really like the concept of the game! Everything is lively and it looks really good with the blue and red effect. I had a lot of fun even though I couldn't get passed the third level. I don't know if it's a web build thing but the axes kept going through the enemies, so I tried to play it without the axes but it was really impossible in level 3. (The mac build didn't run on my machine)
Dismiss my strike through comment just a bit. It's the vsync option, I was playing on a 30hz monitor, on my 60hz monitor it's working fine!
Great game, but also very hard.