User Summary Similar to the tower defence game Kingdom Rush, this game features towers with slightly different powers and instant effects to stop invading creatures from reaching the main tower. Levels of successful defence allow for purchases of improved towers. One thing that sets this game apart is that gems pop up during play that can be clicked on and added to your stock for future purchase for tower improvements. And while this can lead to grinding levels for gems, it is perhaps the only variation from Kingdom Rush outside of slight graphic changes.