In a nutshell, the app is all about shooting and clearing a stack of discs to complete the level. You will be provided with different challenges that you will need to complete in order to advance to the next level. There will be a variety of weapons and armories that you can use in order to clear the stack. You can also upgrade your weapons and armories in order to increase the number of shots and damage. You will also be provided with different items that you can use in order to clear the level.