Slap Fight cheats and cheat codes for PC

Cheat:
Insert a credit and select 1 player. When you begin the level, just 
sit there - don't kill anything. Let your player be destroyed. 
When you begin again, you'll have all weapons and powerups! 
If you don't fire at all, but dodge your way through the enemy 
shots as long as possible, you'll get a big bonus and start your 
next life just before the second big boss. You have to get 
as far as the ring shaped pool to get this.