Hi all,Thank you so much for your interest in our game, I hope you all enjoy playing it!We've been working hard on getting the collector's edition together and today we have put in a two player mode. It's quite good fun, simultaneous competitive co-op, both working to the common goal of destroying all the invaders, with shared bonuses etc, but still with an aim to get the highest score.I'm really glad for all the support we have received, it's you guys who keep us going and excited to be making games for the Megadrive again!Phil