Professor Doctor Jetpack is a physics based lunar lander game in which you embark on a dangerous journey to... control your jetpack. And to save the world.

Explore an intricate cave system with over 85 handcrafted levels, riddled with deadly traps and enemies, while trying to master the gasoline filled, jet powered deathtrap strapped to your back. How far can you make it? Will you be able to save the world from its greatest threat lurking in the heart of our planet?

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Play the first of four biomes for FREE and unlock the rest with a single in-app-purchase!

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Features:
· Atmospheric pixel art
· 85+ handcrafted levels, with ever increasing difficulty
· Unique and challenging bosses that will put your skills to the test
· Fun to learn and hard to master
· Unmatched sense of achievement
· Unlockable and upgradable equipment
· Casual mode: Jetpack with "training wheels"

// Option A //

To download Professor Doctor Jetpack mod from HappyMod.com.
You need enable the option "Unknown Sources".
1. Click on the above link to download Professor Doctor Jetpack 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 Professor Doctor Jetpack 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 Professor Doctor Jetpack in HappyMod App.