Sure, I wasn't going to spoil the fun of discovery. But since you asked, here are the power-ups (SPOILER ALERT: if you want to find out how they work in the game, stop reading):
- The Magnet tile will drag the tile you match it with to the magnet's position. The magnet tile then removes itself off the board.
- The Floater tile will raise the tile you match it with so that the tile next to it will become available for matching.
- The Swapper tile will make the tile you match it with switch positions with the one next to it.
- The Swirl tile will mix all of the tiles in a small area.
- The Power tile removes all tiles same as the one you match it with.
I think that's it. If I encounter more, I will add them.