I mean it's a typical match-3 game. I notice a bit of pay to win with the hard levels, you seem to have terrible luck with them unless you use a power up, even compared to having their free power ups for winning on first try, but that's just speculation on my part. Super Hard levels are fine just the Hard ones, ironically. Anyways, gets old after 600 levels or so. I wish the aquariums were more realistic and you could like save them as your live screen saver.