The art, sound effects and music are all great in this game! I loved playing it and it was a lot of fun. Just something I found a bit weird was that sometimes the turrets shot into the wall and the bullet would die before it got out, but otherwise no problems! Just one last personal thing here, I would have made the first couple levels a bit easier to ease the player into the mechanic. Overall great game, one of the best I've played so far!