I was really impressed with this game. I really like it. I love scif fi so this was up my alley! I think aiming had a slight learning curve but it was not too difficult. Sometimes I felt I was aiming right at an alien and it wouldn't hit. I love the art and the voice acting! Very well done!
I couldn't tell if I was supposed to find more batteries because I couldn't find any. If there were more, maybe there could be some way of indicating to the player of what to do next. I wasn't sure. Otherwise I got to wave 11 so that felt pretty good lol.