you need a good computer that has a good graphics card and a Vulkan support i actually don't know what Vulkan support is... but it says "required" though.
I think its cause your computer isn't compatible, or you just don't have the requirements. in the description it says what you need for a normal gameplay.
I really like how this game turned out honestly a bit short but that's fine for a game worth 1.20$. and would love to see more maybe levels where you fight different people or a multiplayer I would honestly pay more for a multiplayer.