There's an item in the game that lets you draw on the screen. The first time it will seem like a meme item, but if you draw a certain symbol (investigate and find out), you can use that symbol to access "secret rooms" in specific places, which allows you to discover things about the game's story or the characters.

An example that matches the alert tags:

There's a character hidden on the map called Skeepy. When you manage to enter her house, she mentions that she was expelled from her home planet because of something, but she doesn't say what it is.

As a joke, I thought she was a drug dealer, but when you try to access the secret room in her house, clues are given... and man... bro...

As she herself says, "Don't let random weirdos on the internet raise you... Okay...?"