Mosaic Blocks is a 9×9 puzzle. Your tray always holds three polyomino pieces: drag them onto the board or place them with a tap. Fill a row, a column, or a 3×3 square completely and it clears, freeing up space. Place all three tray pieces and a new set arrives. Fair generator: a set is never dealt dead — at least one piece is guaranteed to fit the board when dealt. Then it's your planning: pieces rotate with a button in the tray, no timer. Run scores add up into mastery and unlock patterns inspired by Russian folk crafts: Gzhel, Khokhloma, Maiolica, Mezen, Zhostovo, Finift — six palettes, switch between runs from the collection screen. Three rewarded boosters help out: swap the tray, clear one cell with a hammer, or get a move hint. After a loss you get a second chance: the bottom three rows are cleared. An unfinished run is saved until next time. The game is endless: no levels, no timer, no multiplayer and no daily quests — just the board, three pieces, and your best score.
Drag a piece from the tray onto the board, or use tap-tap: touch a piece, then a board cell — it snaps there. Rotate a piece with the button in its tray slot — free, as many times as you like. The longer the run, the more often large pieces come. Fill a row, a column, or a 3×3 square completely to clear it. Clearing several zones in a row without missing builds a streak bonus. Once the tray is empty, a new set arrives — the generator guarantees at least one of the three pieces fits the board (perhaps after a turn) at the moment it's dealt. The run ends when none of the three tray pieces fit anywhere. Watching an ad unlocks: a full tray swap, a hammer (remove one cell), or a move hint — each booster works once per run. After game over you can watch one ad for a "second chance": the bottom three rows clear and the run continues.