Stackblitz

Stackblitz is a clean, distraction-free block stacking game that runs right in your browser tab or extension popup: no installs, no ads, no fuss.

Stack falling blocks, clear lines, and push your high score as far as you can. The game gets faster as you level up, so there's always a new challenge waiting.

FEATURES
• 5 visual themes — Default, Light, Neon, Retro, Matrix
• 3 difficulty levels — Easy, Medium, Hard
• Speed progression — every 10 lines cleared increases the pace
• Hold piece — swap a block to save it for later
• Ghost piece — see exactly where your block will land
• High score saved per difficulty level
• Line clear bonuses — Double, Triple, Quad
• Pause anytime, resume instantly

CONTROLS
← → Move
↑ or W Rotate
↓ Soft drop
Space Hard drop
C Hold piece
P Pause / Resume
I Show controls
↺ Restart (requires confirmation)

Everything runs locally and no data is collected or sent anywhere.