Maxwell's Demon

Push the bouncing balls around in each level of the game to guide them home and win points. Reach the target score for each level to progress to the next level. In all levels, the home to which the balls must be guided is labelled with "+1". Sometimes there is one home for all balls. Sometimes there is more than one home, with different coloured balls intended for each home.

There are also some special types of balls. Bomb balls explode on contact with other balls. Some explode when you touch them. Some explode when another ball explodes nearby, potentially setting off a chain reaction.

As well as the walls off which the balls bounce, there are also doors which can be opened and closed by touching on them. When closed they're shown as flashing coloured lines or blocks. Some open and close individually. Some are linked to other doors. Sometimes opening one door will either open or close another door. This can help or hinder you.

In each level it is up to you to figure out how to make use of all this to guide enough balls home to reach your target in the time allowed.