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parallax scrolling and you will understand how great it feels.
Each level of course gives you a rating on how well you completed it. This score, as well as how many levels you have completed, can be compared to your friends. It uses Facebook, which is nice because I do not think that any of my Android friends have played yet. On the other hand, now I am comparing my score to people who I have not talked to in ages (one of them went to elementary school with me, still not sure why we are friends on Facebook).
Up until now, everything has been sunshine and roses. Unfortunately, they drop the ball in a way that is very important to me. The game is monetized through in-game power ups. For example, you have five lives, losing one whenever you fail a level. They regenerate one every 20 minutes or you can pay a little money now to keep playing. When you fail a level, they will offer you five more moves and an item that will solve all your problems for only a dollar!
A side effect of this is that I have now realized that the original Dots suffered the same problem, though it was not quite as obvious. Over time it became more difficult to earn power ups solely through playing, and if you wanted to beat your friends at it those power ups were crucial. Both games are pay-to-win, and I am done with them.