I somehow went outside the walls during my first playthrough, or rather, got into a state where I could go through all the walls.  I do need to say I was so startled by the sound effect of the enemies that I jumped in my seat and ricocheted my character the opposite direction from where I'd been going XD
Definitely an interesting idea.

I like the underlying idea and its adherence to the theme! The game mechanic itself.... well I found out that I survive longer when I just run and not shoot at all. But maybe that was the pacifistic message you wanted to teach your player ;) Well, in the end I got out of bounce and could have survived for eternity. If you would refine the actual gameplay, the idea can make a fun game!

This concept is interesting. I feel that for some people it will have limited replayability as you can't ever 'win'. However for a lot of people beating their own high score is something they would put time into. Sharing a health pool with enemies has a lot of potential. I did find the graphics hard to follow at times. 

Rated.

This Is a really cool and smart concept, but I felt it could have been pulled off better. Still this is a very good idea, and I'd love to see it expanded on. You should have more ratings. 

If you want to check out my game, here it is.

https://itch.io/jam/gmtk-2019/rate/461710