Not targeting iPad2 and iPad3?

This may be a dumb question. Can I make my app not available for certain iOS devices (old phones, and old tablets?). It's a 3d game (for toddlers) and runs like a boss on newer devices and looks great. On older devices (especially the iPad2) it gets bad frame rates (22-26 fps). I would simply like to skip those devices!

I've looked at my iTunes connect settings and all that, and saw nothing, so I assume there is no way to do this.

Thanks,
Seth