I like puzzle games, especially when they make me think. Yes, they can get frustrating when the solution doesn't come quickly, but that's what a good puzzle game does. They make you think, and think, and think, until you finish it. That's what Cavern did. It made me think, and think, and think, until I almost gave up, but then a solution came, and it made me keep going. The first puzzle went fine, I got a little stuck on the second, I breezed through them up until the eighth puzzle, and then I hit a roadblock. It took a good while for me to figure it out, but when I did, it was immensely satisfying, and relieving, because it meant I get to sleep tonight. Kudos on the brain stimulating game, TurkeyOnAStick and SirNightOwl. You did good, and you've earned these 5 stars.