In the Menu

Right Arrow: Select menu option (must be clicked once on startup)
Left Arrow: Go back to previous screen if in a sub-menu
Up/Down Arrow: Navigate menu options

In the Game

WASD: Move around
Mouse: Move camera angle
L Mouse: Shoot/Attack with weapon
Scroll Wheel: Change Weapon
Left/Right Arrow Keys: Turn left or right
Space: Open doors
Escape: Pause the game. Pause screen is the same as the main menu.

After you launch the game, press right once to view the menu.

New Story: Start new game
Load Story: Load a previous save file (4 slots available)
Save Story: Save current game, only usable after you hit Escape while playing a new or loaded game
Settings: Adjust the volume of the menu music, in-game music, and in-game sound effects
Help: View controls
The End: Exit the game

Ammo
Adds up to 12 ammo, often dropped by enemies, gun MUST be equipped to pick up ammo. Max ammo is 32.







Health Potion
Restores up to 30% health, rarely dropped by enemies and more often found while exploring.









Explosive Barrels
Shooting them with a gun will cause them to explode. They will not damage you, but I have not seen proof that they will damage enemies either.











???
I don't know what this does. If you figure it out, please leave a comment.









Enemies
If it moves, you had best kill it. The first gun you get and the shovel both deal 1 damage to enemies.















Doors
Doors like this one can be opened with Space, and they will quickly shut behind you.











Locked Gates
These gates can be opened by shooting the lock with your gun.












User Interface
From left to right, this shows your current health, the area you are in, and how much ammo you have for your equipped weapon.

Explore the area to look for the exit. Shoot any enemies you find along the way, grabbing extra ammo and health potions along the way. Your screen will flash red if something is damaging you. Most enemies that can hurt you from a distance are humanoid in shape.

You can save at any time by pressing escape, and it would probably be good to save after you beat each area, or just before you beat a certain area if you know where the exit is. The game has been known to crash between areas, although I think this tends to happen more if you press buttons during the transition time; however, I think you have to hit right arrow to advance to the next area.

I sincerely hope that you have found this guide to be helpful. If you have, please leave a like and possibly a favorite. If you feel there is something that should be added to this guide, or if I've gotten something wrong, please leave a comment and I'll do my best to update the guide. Thanks!