Gardenscapes-
All levels have chargeable power-ups, though they are only activated when you do certain things. At the moment there’s only one available in the game: the Rainbow Blast.
Rainbow Blast
It’s located in the bottom corner of the screen and charges a little more every time you detonate a regular power-up on the field.
Once it’s fully charged, a Rainbow Blast is randomly placed on the game field. Swap it with an adjacent piece to remove all the pieces of that type from the field.
IMPORTANT NOTE: exploding several power-ups at the same time charges the Rainbow Blast faster.