Yeah. There's a 100% value drawings that the hints start to unlock. The goal is to find the rune that gets you 100% invincibility. Each cell has fixed value. I didn't want drawings to be valued randomly. The hints unlock which grid cells have how much value. You don't have to use them. I just didn't have time to test or balance difficulty so they're an optional feature to prevent the puzzle being too hard.
Thanks for the review! I'm glad you liked the game.