Very nice looking game, with an interesting idea to play around with the border switching - can definitely imagine this being fun if expanded :)
What i found out is that you actually do not need to kill anyone. If you just go to the right side for the melee form, you can quite easily dodge the bullets, since they dont follow you much, and you can just skip most of the combat :) not sure what the solution for that would be, but just a note that it can be played like that
I really liked the art, it has an overall warm feel to it, the colors were chosen nicely and the aesthetic of all the wood is very pleasant. It could use some music or ambient background though, it helps out with the atmosphere significantly.
But overal, it was fun to play and it is a very solid entry for a game jam, thank you for the game :)