Pre-Grant Publication Number: 20070220238
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Discussion (13)
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I imagine this would constitute prior art. I'm sure there is prior art before me as well.
See screen shot here:
http://img.skitch.com/20071230-xw5qfq9dwb97b5rb86t73i9q5h.jpg
Discussion of game here:
http://ballyalley.classicgaming.gamespy.com/ballyalley/two_astrocade_pd_programs.html