How to Level Up
This has worked for me personally and results may vary, it all depends how well you do in games. However, this method is guaranteed to be better than just playing the game normally on PC.
- Download BTD Battles 2 on a mobile device/tablet
- Connect the accounts using your Ninja Kiwi Account
- Now play the games on the mobile devices and, at the end screen there will be an option to add a 2x multiplier to the XP if you watch an ad. Simply watch the ad each time the game is over and you will earn twice the XP.
This method saves a lot of time and at the same time supports the creators of the game, so I see this as a win – win.