This would be a mobile rhythm game in which the player would be required to defend a castle in the middle of the screen from incoming waves of enemies. The player would be required to tap the enemies on the beats of the song. Different difficulties would change the number of enemies, along with the window of window in which the player is able to tap. When the player taps an enemy on the beat the enemy will be killed. The number of enemies spawned would depend on the part of the song. For example, in a pop song the verse would have less enemies spawned, and as the song builds up to the chorus more would be added. Finally, at the chorus the number of enemies would be at their highest. The player would be able to import their own songs, and the game would analyse the BPM and other parts of the song (for example where the chorus is). This will allow each player to have their own experience, while listening to the type of music they like instead of a certain genre being forced upon them.

Image from http://www.quartertothree.com/fp/2012/02/09/five-reasons-you-should-play-unstoppable-gorg/ Retrieved 7/8/2016