If you play any of the slots in the GameTwist Casino, you receive XP (experience points). For every spin in any of the slots completed by you, the blue XP-bar in the top right corner will fill up bit by bit. To the right side of the XP-bar, your current level is displayed. Tapping on the XP-bar will open up a dialog window in which you will see how many experience points exactly you are still missing until you’ll have reached the next level and how big a Level Up Bonus in the form of GameTwist credits you will receive.
Once you reach the required experience points for the next level (Level Up), it automatically opens the Level up window, where you can collect your Level Up Bonus in the form of GameTwist Casino credits.