There are some small issues:
-Damage Cup should be raised. I have already hit 9999 multiple times with Mardek. And that's still in chapter 3. By the end of chapter 4 I'll be hitting 9999s with many characters. This shouldn't happen less than halfway through the game.
-New abilities. I got all abilities with Mardek. We need new ones for Ch4.
-Compatibility. Since Ch1 was small I didn't have a problem playing the first two chapters all over. However, if you release, say, chapter 7 and it's incompatible with the rest then I won't fancy spending 2 weeks to play the game from scratch.
-Items. Those scarabs we got from the Annihilators are pretty haxed. I'm not sure if I'd replace my red scarab with whatever you think of releasing next.
In any case, Mardek is by far the best flash game and one of the very best games OVERALL I've ever played. In fact I had more fun playing Mardek than playing half my games on Wii. Just consider these long-term issues.
I love the whole genetics concept but I hate textual MMOs that make you wait hours for energy refills and stuff. I give it a 4/5 and I hope that next time (sequel?) you think of something involving this concept but MUCH different gameplay. You could have done a game like this without forcing people to wait 30 hours to hatch an egg. How does something like this make a game better?
Wow, those birds sure are tough... They are hit by a meteor... twice... and keep on flying! I'm gonna down them all this time!
As for the game - 5/5! Needs badges though! (And a sequel...)