How do you play Light Stacker?
A row of lights slides left and right on a tall LED board. Tap to stop it, keep only the cells that overlap the row below, and stack your way up. It follows the same rules as the stacker prize machines found in arcades.
The board is 7 cells wide and 15 rows tall. The first row stays wherever you stop it. From the second row on, only cells sitting on top of the row below stay lit. Cells hanging over the edge blink, drop and go dark, and the cells you keep become the width of the next row. If nothing overlaps, every light falls and the run is over.
How fast does it get?
On the first row the lights move one cell every 0.2 seconds. Each row is about 8% faster, reaching one cell every 0.06 seconds near the top.
The width is also capped by height, so even a perfect player ends up placing a single fast light exactly on top of another single light.
| Height | Max width | Prize |
|---|---|---|
| Rows 1 to 5 | 3 cells | None |
| Rows 6 to 11 | 2 cells | Small prize at row 11 |
| Rows 12 to 15 | 1 cell | Big prize at row 15 |
How do the small and big prizes work?
When you finish row 11 you choose: take the small prize and stop, or risk it and go for the big prize. Reach row 15 and the big prize is yours.
If you go on and lose every light, the small prize is gone too, just like the nail biting moment on a real machine. The prizes are the gift boxes and teddy bear drawn in the showcase at the top. Win the big one and the whole cabinet flashes in rainbow colors with a fanfare. There are no coins or money, and you can retry as often as you want.
What modes are there?
Three: Classic for the 15 row prize climb, Endless for a high score with no top, and Two Players for a height battle on two machines taking turns.
- Classic: the rules above, aiming for the small prize at 11 and the big prize at 15. Your best height and big prize count are saved.
- Endless: the board keeps scrolling up. The width is capped at 3, and four perfect stops in a row bring back one lost cell. Every 10 rows plays a chime and the lights change color.
- Two Players: a red 1P machine and a blue 2P machine stand side by side and you take turns stopping one row each. If one tower falls, the other player keeps going alone, and the taller tower wins.
Any tips for stacking higher?
- Feel the beat, not the light. The lights step at a steady rhythm, so counting the beat is more accurate than chasing them with your eyes.
- Use the bounce. When your tower sits against an edge, the light hits the wall and comes back on a predictable beat.
- Do not lose cells in the first five rows. Lost cells never come back in Classic, and the top gets much harder.
- Press a touch early. Your finger needs time to reach the screen, so on fast rows aim half a beat ahead.
- Think at the small prize. From row 12 the width is one cell and one miss ends it. Go on for records, take it to collect prizes.
What does the machine look like?
A black metal cabinet with a neon trim, a PRIZE marquee with chasing bulbs, a prize showcase, an LED grid and a big STOP button.
Unlit LEDs stay dark while lit ones glow softly. The cabinet shakes a little when you stop, the stopped row flashes white, and falling cells play a quick electronic blip. Every picture and sound is drawn and synthesized in your browser.
Controls
- Phone or tablet: tap anywhere to stop the row.
- Mouse: click the screen to stop.
- Keyboard: Space, Enter or the up arrow stops the row. On the small prize screen, Space goes for the big prize and X takes the small one. On the result screen, Space plays again and Esc returns to the menu.
Your records stay in this browser only and are never sent to a server. The prizes on screen are drawings and have nothing to do with real rewards or money.