Interesting idea and clever mechanics. A different take on the "only one weapon" concept.
Here's a game I made with a friend, if you'd like to check it out:
https://risgrynsgrot.itch.io/the-one-spear
It's a 1v1 game with only one weapon. If you don't have 2 controllers and someone to play with, there is an optional build where the right player is an AI and you can alternatively use keyboard + mouse (found in comment section).