Notes

This is the camera button.

You can still use the gun in cameras.
Don't stay in the cameras before Phase 2, you will get softlocked.

Phase 1

Click the insert bullets button to insert bullets, try to preserve as much as possible for phase 2.
Press Space to Shoot.

Mario/Quadrider: He'll start in CAM 2 and make it to your Office. Make sure you have enough bullets to shoot him, so that he'll get away.

Goon Juice/Acephalous and Disembodied combo with big arm: When he appears in your office he'll say a random number from 1 to 4. Go to the camera which is the number he says.

Tony Cohrt: He'll be in CAM 1 and start to rise up. Hover your mouse to bring him down.

Green Spinning Floppa: He'll appear randomly and follow your mouse to prevent you from clicking things. Just click on him to get rid of him.

Phase 2

You can't insert bullets anymore on this phase, so that's why you should preserve them on phase 1.
Click on the door to go to it, your cameras are moved there.
Press W to hold door shut.

Waluigi: When he moves he'll make a sound of someone saying "Get back you idiot!". Hold the door shut to move him back
Wario: Works the same as Waluigi but except he doesn't appear at the door and you have to shoot him to move him back. You can still shoot him even if you're at the door.

Endings

Main Ending: Keep your Cameras down and have some bullets before The End.
Nightmare Ending: Same as main but you keep your cameras up.
Worst Ending: Have 0 bullets before the end.
True Ending: Have some bullets and in The End screen press space.

That's all for now, my fingers hurt. If I missed something let me know.