I was gonna shorten it to Cyber 6 this year. Thought it had more of a ring to it... and apparently I was right since it's already a feckin' thing!
Anyway, complete the game to unlock Hell Mode. A content warning is in order for the horror that awaits you there, not that you'll get that far...
Left/right arrows - Move Up arrow - Jump Down arrow - Crouch A - Shoot Z - Skip M - Toggle sound