Hit 't' during gameplay, then type in WINPACHINKO then hit enter.
When starting the game hold down the key (Apple Key).
There is a part near the start of the level with a 360 degree rotating gun turret and a forklift. Get in the forklift and find an enemy. When they appear and start firing at you, do not shoot the forklift gun. Instead, run the forklift directly at them. If done fast enough, you will run over them and crush them to death.
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