had fun, thanks! (didn't figure out how to unlock 18-20)
Viewing post in _________ (What Even Is That Thing?) comments
More hints:
1. _________ is, not coincidentally, the title of the game. But what letters do those underscores represent?
2. The clue here is a reversed musical note, and do you notice anything about the ingame music?
3. There is only one place you'll find a 5x4 grid in the game and it shows a picture depicting what phenomenon?