Tokens consisting of 4, 5 ore more squares are falling down. You can move, turn or mirror them in order to build complete rows that are blasting when they are completed.
There are different modes of playing concerning the numbers of squares of a token and sizes of the playing field.
You can also choose if mirroring is possible or not.
For a harder game you can fill a part of the playing field with rubbish before starting.
Sometimes little bombs can help blasting inconvenient squares away.