- Drag & drop: you are given block shapes (often multiple at a
time) which you drag from a panel (or bottom of the screen) and
drop into a grid. Playgama.com+2Gamesflow+2
- Clearing rows/columns: when a full row or a full column is
filled (no gaps), it is cleared from the board, giving you
points. KidzSearch+3Poki+3Y8.Com+3
- No gravity / no falling pieces: unlike classic Tetris, blocks
do not fall down row by row. You place freely; no continuous
downward movement. Poki+2Gamesflow+2