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Original post by adam17 it was pretty cool but a suggestion though. maybe change the colors of the ships to add a little variety between the levels. also give extra lives during the game. for example score 1000 or 1500 points and gain another life. maybe as the levels progress make it harder and harder to get extra lives.

It's funny that you mention those two things. Actually I was thinking about changing the invaders' colors in harder waves for a long time. Before doing that I added some code which blends each invader's color between green and red as he gets damaged. In the lower waves it only takes 1 hit to kill an invader but in the higher waves they can hit each other or the bunkers or take shots and be damaged but not killed - so their colors will change to gold, brown, red, etc. After doing that I thought it was pretty nice and I'd leave it as it is.

As for extra lives, if you score a hit rate >= 90% then you will get an extra life at the end of the wave. Use the cannon to bowl through the invaders and you will get high hit rates (even > 100% because hit rate is given as shots fired / enemy hits).

Richard