I have the free version, and it is great, but if I wasn’t so completely broke, I would definitely buy the full version - just to support the creators of this awesome game…the game is based on a simple idea, with a infinite amount of possible puzzles…the score is based on the number of moves, and not timed, which I think is great. I would love it if, in addition to the world average number a moves given for each level, they also gave the number expressing the fewest possible moves needed to solve the puzzle. I think that would be just the number of squares on the board that are not fixed in place, so I guess I could just count, but it seems like it would fit perfectly alongside the “world average”. - Also, I love the little messages that congratulate you when you complete a level, but so far I have only seen two messages, and I WOULD SERIOUSLY play the levels just to see a new colorful celebratory catchphrase…I think that the creators should ask for players to submit their ideas, and I volunteer to help in any way I can - I am an artist, and a desperate, hopeless color addict- you can find on my work on giphy, picsart, redbubble, and others as dinaaaaaah - d-i-n-6 ‘a’s-h - and I found the game original, relaxing, beautifully designed, challenging, and ultimately satisfying ❤️