PixelTris by Momo Games

PixelTris turns falling-block play into a sand puzzle. Each piece breaks into grains when it lands, and a continuous band of one color clears when it reaches both side walls. Clear another band within three seconds to increase the combo multiplier. The run ends when the piled-up sand leaves no room for a new piece. Move with Left/Right or A/D, rotate with Up, W, or X, and soft-drop with Down or S. Space drops the piece immediately. Touch controls use dragging to move, tapping to rotate, and a downward flick to drop.