What kind of bonus combinations are there in the game?

You can combine bonuses in the game to get the enhanced effect.
Here are all the combinations of the bonuses:
* two Kites - launch three Kites in total;
* Kite and Rocket - activate the Rocket on the cell the Kite flew to;
* Kite and Bomb - activate the Bombs on the cell the Kite flew to;
* Kite and Rainbow Ball - replace all the pieces of the same color with Kites and activate them;
* two Bombs - give you twice as powerful explosion;
* Bomb and Rocket - destroy 3 vertical and 3 horizontal rows;
* Bomb and Rainbow Ball - replace all the pieces of the same color with the Bombs and activate them;
* two Rockets - destroy 1 vertical and 1 horizontal row;
* Rocket and Rainbow Ball - replace all the pieces of the same color with Rockets and activate them;
* two Rainbow Balls - destroy all pieces and one layer of any obstacles on the field.