Sentinel is an interactive audio tower defense game. The game takes place on a sequencer-like grid. As you add defenses, collect resources and destroy enemies, musical elements are triggered in time to the music. The game is a mixture of standard wave based levels and puzzle levels where the player must defend their core using limited defenses and resources. I've been developing it in Unity for about 10 months so far and hope to have the game completed in the first half of the year.