hey bro uhh i found some commands and cheats you left in the game here they are
Press ` to bring a console and then type these cheats and hit enter
GUN or CHEAT = all weapons with alot of ammo
SETGUN # (1-8) = set current gun depending on value from 1 to 8 (8 is unused minigun)
BEE or GUTHOOD = 999 health
HP # = set your HP if you set it to a high value you will have god mode for example like this (999999999999)
KEY = all keycards
WATER (0 or 1) = enable water in levels
NEXT = skip to the next level
ENDING = game ending
MAPTITLE (name) = change map title to whatever you put as the name
KILL = kill yourself
RESET or RESTART = reset the level
EXIT = exit the game
CENTERWIN = centers game window