Subaku, Japanese for Number Explosion, is just as it sounds. You touch a number, it explodes (value decreases by one), then the surrounding numbers pick up some of the collateral explosion (value increases by one). Easy to learn and difficult to master, Subaku will keep you entertained for hours as you devise strategies to attack each puzzle and complete them in as few moves as possible.
Subaku contains one hundred puzzles to solve and master. Also available to play is "Endless Mode" where the goal is to make matches while not letting the board clear.
Soundtrack by Eirik Suhrke. (Spelunky, Super Crate Box, Ridiculous Fishing)