Sumz! - brain teaser game from WellGames.com. This multiplayer online game really makes you think. The game reminds tetris a lot, but here, you get sets of squares with numbers on them. The goal for you is to burst all the spheres on the board. You do that by matching the numbers on the squares in such a way that you get the required number, for example, 10. Try to match squares with spheres as much as possible to complete the level. The game does take thinking, and that's what makes it addictive.