The game is to knock down the boxes using a slingshot and balls.
This is a level game. It has many unique and interesting levels where you have to knock down all the boxes using your logical and aiming skills to complete a level.
The physics used in this game is very accurate and interesting. You will surely enjoy it.
You can also zoom in, zoom out and move the game scene to see close look.
So just download and enjoy this interesting world.

// Option A //

To download Knock Down mod from HappyMod.com.
You need enable the option "Unknown Sources".
1. Click on the above link to download Knock Down mod APK.
2. Save the file in your device Downloads folder.
3. Now tap on Install and wait for the installation to finish.
4. Once it is done, open the game and start playing it right away.

// Option B //

To download Knock Down from HappyMod APP, you can follow this:
1. Open your browser and download the HappyMod APK file from HappyMod.com - the only official website of HappyMod.
2. Open Android Settings and go into Privacy or Security.
3. Tap the option to Allow Unknown Sources and enable it.
4. Go to your Android downloads and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search Knock Down in HappyMod App.