Ohh gotcha! The first time I played it I got stuck on 14/15 enemies and couldn't find the last one. I just went back in and tried again and was able to find that last enemy and could see the upgrades. Very cool and made the gameplay a lot more fun and interesting! My one feedback is that it would feel a lot better imo if enemy projectiles didn't blow up your own projectiles. It made it hard to shoot into a group when most of my shots would get eaten up before reaching their target. Fun game!