For this, you just have to beat the game as you normally would, and at the end, during the credits, the password will be there. If you're lazy, you can skip this step — here's the password.

You'll have to enter a game, either in normal mode or in a challenge mode. There, you'll need to look for a door that has a robot face icon on it.



Inside this door, you can skip taking the item and go straight to the doors — in the middle of them, there will be a robot computer.



You'll interact with it, and a computer screen will appear. You'll type the password "Eclipse" and unlock the GLITCH ability.

If you're going to use this ability, I recommend lowering the graphics to the minimum, since this ability is extremely overpowered and can drop your FPS to 0.

Examples of instakill on the 2 bosses.




And that's all, I hope this guide helps you.