The rules to this puzzle game are super simple: each puzzle has 4 number tiles, and you can throw them at the walls to make new numbers. Use all the number tiles to make 10 and you win! There are 50 Levels for you to play, as well as an infinite randomly generated mode. You earn points by completing puzzles and can use them to unlock hints if you ever get stuck. It's much easier to earn points in Random mode, so it's a good idea to grind there if you need to save up for hints (you'll probably need them, since the levels get very hard!).