Shapes fall into the well. Move and rotate them so they fill complete rows — full rows vanish and score points. Clearing rows charges the OVERDRIVE meter; when it is full you get a Prism block that blasts a 3×3 area. The stack reaching the top ends the game.
Starts at level 6 — for fast fingers. Play Neon Stack: Turbo free in your browser — no download, no sign-up, on phone or computer.