Stack the falling blocks, clear the lines, and survive rising junk.

Falling-block strategy that holds up

Falling-block puzzles have been around since the mid-1980s, and the core idea has barely changed because it does not need to: pieces of four squares fall, you steer and turn them, and a full horizontal row disappears. What separates a good run from a bad one is not speed but tidiness. A flat, even surface gives every future piece somewhere to go; a surface full of holes and spikes does not.

A few habits help. Look at the next-piece preview before you place the current piece, so you can leave the right shape of gap. Keep the stack low and flat, and avoid creating covered holes, which only clear after you dig down to them. Leave one column empty at the edge for long pieces, and use clears of several rows at once to score much more than single rows. The ghost outline shows where the piece will land, so use hard drop only when you are sure.

Blockfall has three stages. Stage one is a gentle warm-up of fifteen lines. Stage two starts with four junk rows, each with one hole, and wants twenty-five lines at a quicker pace. Stage three starts with eight junk rows and a fast drop speed over thirty-five lines. If the stack reaches the top you lose a life and the top of the well is cleared so you can carry on, but you only have three.