I've decided to make a "Level Select" screen, but it being actived only if the player put an a specific key combination.

The best example that I could find is the game Five Nights at Freddy's 4. When the player types "20202020" on keyboard, the game unlocks a secret night.

In my case, when the player types "LEVEL" on the keyboard, the "Level Select" would appear. How do I replicate this configuration?

Thanks for the attention!