Fill a complete row or column with one word plus the emoji picture tiles that match it. When the line contains the word and its matching pictures, it blasts and clears the space.

Drag a tile from the tray onto a board cell, or tap the tile first and then tap the cell you want it in. Both methods work on desktop and on touchscreens.

Space is the main constraint, so clearing lines regularly is what keeps you going. Placing tiles where they can contribute to both a row and a column is the most efficient way to keep the board open.

Not especially. The words are everyday ones, and the emoji pictures act as clues about which word each tile belongs to, so the puzzle is as much about matching and placement as it is about spelling.