## Description
_Piano Tiles_ is a fast game played on a field filled with tiles. The goal is
to tap the black tiles, avoiding the white ones, while the screen scrolls
vertically. Generally the screen only moves up or down when the correct tile
is pressed in a timed game, or the screen scrolls at the steady speed and the
player has to keep up. Each time a black tile is tapped, a piano sound can be
heard. When a white tile is tapped an off-tune note is played and the game is
over.
There are different game modes with variations on the concept.
* In the classic mode a certain number of tiles needs to be tapped before time runs out. There are different difficulty levels and the 4×4 field can be expanded to 5×5 or 6×6.
* Arcade mode is similar to classic, but here the screen moves at a steady speed and the player has to keep up the pace. The game is over when a wrong tile is tapped or a black tile is missed. Variations include normal or fast speed, and reversed scrolling.
* Zen mode uses the tile movement from the classic mode, but without a specific amount of tiles to reach before time runs out.
* Rush mode is similar to arcade, but the speed gradually increases.
* Relay mode is similar to zen, but here it is possible to reset the time limit by tapping tiles.
* Arcade+ mode is like the regular arcade mode, but with all kinds of difficulties that can be selected prior to starting. These include lightning that lights up the screen, a bomb that causes an explosion, mist clouds etc.
Each mode generally has multiple variations. In the options the music playlist
can be rearranged and it is possible to define new colours for the tiles
instead of the regular black-white combination. Diamonds are earned by
performing well. Optionally these can be used to continue playing when the
game is over.
The game is free-to-play. On iOS in-app purchases are supported to remove the
advertisements and to receive additional tiles. On Android you can determine
if the ads should appear as a pop-up or a banner.