Its quite good
i believe all amazing games start with a good concept. I believe this game is has a good concept and that it can be improved so that its better. If you learn some more flash you could make it so that there's upgrades, levels and diffrent types of bad guys. If you discide to make a better version i recon it could be good
Please excuse my bad splelings
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P.S: The lives system works but it goes into negative numbers and it dosnt end the game if you loose all 3.