Rex isn't your average shooter. Throughout the game you destroy enemies while simultaneously making music. The gameplay is usually fairly simple and easy, but the amazing soundtrack and the trippy visuals add a lot to the entertainment value. As far as gameplay goes, some of the boss battles can be somewhat challenging though, but still quite fun. Overall, a very enjoyable game, especially if you are into any type of psychedelic drugs, I'm sure this game will remind you of those effects.