It seems pretty good but then again we don't know yet how much was needed to cover production cost. On the other hand, the Indiegogo campaign was very successful and I bet it will sell even more once story mode is complete. It would be interesting to hear from Mane6 how it went so far from their perspective.
Recall that they do have publisher support now as well, from Humble Bundle. Though that's likely mostly for post-Goat content development, I'm sure it could go toward hiring extra bodies to get said development done. Devs have said in the News forum that money from game sales is helping out in allowing them to hire an additional pixel artist.