After having unlocked a power up, you can view it from the main menu by clicking on the lightning bolt icon.
In your power-ups menu, pick a powerup that you would like to upgrade and tap
. This screen now shows you a summary of your power up, the current level, it's effect, and the cost of upgrading.
Tap
again to spend your coins for an upgrade. You will need a
total of 4080 coins to fully upgrade a single power up. This took me roughly 40 - 50 plays.
To level 1: 16
To level 2: 32
To level 3: 64
To level 4: 128
To level 5: 256
To level 6: 512
To level 7: 1024
To level 8: 2048
You can gain coins from pickups in the maze, both yellow and orange coins give a boost. As well as completing missions, and getting a free gift at the end of a game.