DON'T DOWNLOAD THIS GAME!!!!!!!!!!! Played this game for about 3 weeks then I deleted the app with a smile. You developers shove so much into a small app., that I can't enjoy the game due to the incredible amount of lagging/freezing/and shutting down. This leading to countless times waiting. If I were to play for a half hour, I would get about 2 full minutes of actual play time. Due to the asinine loading between tabs or glitching out while trying to shoot the DNA drone. This is a terrible game!