Hexa Blocks
Hexa Blocks is tetris-style block placement on a hex grid, with two clean modes: Level mode hands you target scores with limited moves, Endless mode just asks how long you can keep the lines clearing.
Hex geometry changes everything you know — "lines" run in three directions, and the piece that fits nowhere usually fits somewhere you forgot to rotate your thinking.
Tip: keep one corner of the grid empty as a relief valve; hex boards lock up from the centre outward. The block games tag is full of relatives.