It marks a gather point for a repeated color in that piece. When those matching tiles connect, they gather toward the marked tile. The same + stays visible while you drag.
At least one tile would cover an occupied cell or land outside the board. Nothing is placed. Select a piece again and choose open space; you cannot place directly on top of a stack.
When none of the remaining tray pieces can fit on the board. Each new tray has three pieces, with shapes of 1 to 4 tiles as the game grows. There is no timer.
Your best score and top 10 Classic results are saved in this browser on this device. Clearing site data removes them; they do not sync between devices. Records and sharing are available in Bloom Result after game over.
Yes. Tap a tray piece, then tap the board to place it. Sound starts off and can be switched on with the music-note button. You can undo one move when Undo is available.