blocks are falling down in one of the following colors.
You can move them left and right with the navigation below or with keys directly
pushing up turns a piece. Pushing down moves the falling piece even faster.
If a row is full it will disappear.
A Nintendo 3DS Tetris browser game is on froxot.de
Alternatively you can also play other Tetris-themed games, for example with slots at online casinos. Have a look here.