This game shows exactly how you dont need good graphics for a good game.
If you think about it this game is one of the games with worse graphics on the page but it is the highest rated game on the page.
I made this one with no muscles at generation 20 it already had 1200
http://www.kongregate.com/games/BryceSummer/walkinator?creature=114459
It reaches from 200pixels/segond to 300
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