Cheat Codes...
	Game Mode+...
	Invincibility...

Unlock the following effects by selecting 'Enter Code' at the 'Cheat' menu and inputing the corresponding code.

One Hit Kill:
Enter the code 162226

Frozen Bugs:
Enter the code 314142

For this you need to complete the game once.

Go to the Cheat Menu and select "Enter Code", then enter the code 132136 to unlock the cheat.