It's interesting to see another approach to a tiny shooter. I managed 141 points, but I'm not really sure what the best approach is. It seemed like sometimes the green ones took a couple shots and other times only one, and I'm not sure why.
Thanks, your game is very nice and enemies can shoot at you. 141 points is a very high score, congrats! Green ones should take 2 shots to take them down, but I think that they can be hit before they appear on screen, which gives you some advantage as the firing rate is very high.
