He he he at first glimpse I can see that the Year 3122 is a very original year for a futuristic plot, ehmm very far from now, but it works good on favour of the plot.

By the way Only 10 bucks sounds good, having on count that is a Steam Game and basically if it emulates the great Ninja Gaiden it's already a sure bet that it's worth a try. :D

Regards and good game report, mate :)