Interesting concept.
At first i was a bit confused on what to do so it would be nice to have some text explaining that i just have to walk into enemies that have a lower number than me but i managed to figure it out.
The popping in and out of the ground and enemies is a bit annoying. I would recommend to have that happen outside of the viewable area.
The sound works fine for me. (Google Chrome, Win 11)
Overall a pretty nice jam game :)