itch.io

assuming you are on windows
on the downloaded zip file
right click > extract all... > on the new window press Extract

open the CasualtiesUnknown folder
open CasualtiesUnknown.exe,
either the game starts or windows throws out a blue window saying it protected your pc
press More Info > press Run anyway

the game should open

when you get done reading and pressing left click to advance, there should be a maim menu

i like how the movement is like... very similar to Plazma Burst 2, even got the X button to ragdoll

I'd love a mobile version of this

But hey, if sugar game engine doesn't have mobile support, so be it