Prism Stack
Fit falling gems into complete rows. Plan with hold and next-piece previews, then chase an endless high score or a fast 40-line sprint.
How to play
Use Left/Right or A/D to move. Up, W or X rotates clockwise; Z rotates counterclockwise. Down or S soft drops; Space instantly drops and locks. C or Shift holds the current piece once before it locks. On touchscreens, use the buttons, tap the board to rotate or drag sideways to move; a quick downward swipe hard drops. Fill an entire horizontal row to clear it. P or Escape pauses; the game also pauses when you leave the page. Choose Marathon or 40-line sprint before starting.
Controls
- Arrows/A/D: move; Up/W/X: rotate clockwise; Z: reverse rotation
- Down/S: soft drop; Space: hard drop; C/Shift: hold
- Touch: use buttons, tap to rotate, drag to move, swipe down to drop
- P/Escape or pause button: pause; music-note button: toggle sound
Tips
- Keep your surface low and flat. Avoid empty spaces underneath gems.
- The outlined piece shows exactly where a hard drop will land.
- Hold a useful piece for later. You can hold again after the active piece locks.
- Clear four rows at once for 800 points times your level. Consecutive four-row clears earn a 50% bonus.
- Marathon speeds up every ten lines. Sprint finishes at forty lines with no time limit.
About Prism Stack
Bring a little order to a field of falling gems. Move and rotate seven four-square shapes to fill horizontal rows. Filled rows dissolve into light, opening room for the next piece. Marathon mode climbs in speed every ten lines and continues until the stack reaches the top. The 40-line sprint ends when you clear forty rows. A five-piece preview, one-piece hold, landing guide and short landing delay give you time to plan. Clear up to four rows at once, chain consecutive clears and earn a bonus for consecutive four-row clears. Original beveled gem graphics and gentle synthesized sound effects accompany each move. There is no time limit.
