What does うめーな mean here?


The sentence in question is 恵那はやっぱうめーなー. This is from Yotsuba manga chapter 8
and the English translation is "Ena-Chan's good at this after all." I believe
that やっぱ means too/also/likewise and from the English translation I would
think that うめーなー would mean good. If it helps at all, the previous sentence
was よつばはいまいぞ. I didn't understand what いまい meant but the English translation
also said good for いまい. Could うめーなー be slang for some work that means good or
perhaps mean "the same"?

