I agree.

It's really tough to judge the market based solely on one product that's only been released for a couple of weeks.

Marketing will be your best asset here. Put posters on church bulletin boards, college campuses (as many of these kids have younger siblings, or even children themselves), etc.

Don't despair! Like others have said, the sheer fact that you have even completed a game and you have it out there for others to enjoy counts more than anything.