About Stack Blocks
A puzzle about stacking coloured blocks to fill empty squares. Each level starts gently, then asks you to plan your moves with more care. A good way to wake up your brain.
How to play Stack Blocks
Combine numbered cubes and fill the empty squares with coloured blocks. Stack them in the right direction to solve each level. Use your mouse on a computer or your finger on a touch screen, and follow the prompts the game shows when it starts.
Tips for Stack Blocks
- Plan the order before you place anything.
- Look for the block that has only one place to go.
- If you get stuck, restart and try a new order.
Game details
- Game
- Stack Blocks
- Category
- Puzzles
- Built with
- Unity WebGL
- Download size
- About 27 MB, loaded once and then kept by your browser
- Added
- 14 October 2026
- Price
- Free, no account or download needed
Questions about Stack Blocks
Is Stack Blocks free to play?
Yes. You can play it in your browser for free, with no sign-up.
Do I need to install anything?
No. The game runs inside this page. The first visit downloads about 27 MB, so it may take a moment to start.
Can I play it on a phone or tablet?
Most modern devices can run browser games, but larger 3D games can be slow on older ones. If it feels slow, close other tabs and read our tips for smoother browser games.
The game does not work. What can I do?
Reload the page first. If the problem remains, tell us the game name and your device and we will look into it.