1. Start the run
Press Enter or click the game area to begin. The first moving slab drops onto the tower and starts sweeping left to right.
Mountain Stacker Guide
How to play Mountain Stacker
Mountain Stacker is a browser timing game. Each moving slab sweeps across the tower, and your job is to place it at the exact moment it lines up with the block below.
2. Time the placement
Press Space when the moving slab lines up with the top block. Any overhang falls away, which makes the next placement harder.
3. Keep the tower alive
If a slab misses completely, the run ends. Press R or Enter to restart and try to beat your best height.
What makes high scores hard
Each imperfect placement trims the current platform. That means later blocks have less room to land, so the game gets tighter as your stack grows.
The best runs come from staying patient and watching the moving edge rather than the center of the block. Once the tower gets narrow, small timing mistakes matter a lot more.
Controls and quick tips
- Space: place the current slab
- Enter: start or restart a run
- R: restart immediately
- F: toggle fullscreen
- Focus on rhythm early, then slow down mentally once the tower gets thin