Cybercube battle

Single-player battle royale game.
The goal of the game is to remain the only survivor.
Every 60 seconds the circle narrows.
In order not to die, you must keep in a circle.
A choice of 5 characters.
Several types of firearms. (machine guns, pistols, shotguns, sniper rifles)
There are also melee weapons. (axes, knives, machete)