You receive gems for completing levels.
After completing a level, you will have the possibility to add some Extra Gems and progress further. In most cases, you can add 20% extra and this is based on your Gems that your earned in the level.
You have 3 options
- Get the Extra Gems for watching an ad
- Get the Extra Gems by using your diamonds
- Close the Extra Gems Dialog and do not add any Extra Gems
💡 Tip: The more Gems you've earned in a level - the more Gems you can get through the ad or using your diamonds.
💡 Another Tip: Take a look in front of the Train. If you are close to a Chest of your next destination, you could use the Extra Gems to get their immediately.