Our previous financial model (premium purchases and micro-payments) didn't exactly work as expected. We are grateful for the support of our actual customers, and we thank them with all our heart ... but sadly we aren't popular enough.
We are in a position to choose what we can do to expand the scope of the application without abandoning it. Which we don't want to!!!
Finally, as some of our followers had suggested, we are opening to donations and removing all purchase requirements in the app.
This means that now everybody can access to the premium content without any limitations ... and if you want new content to be developed, don't hesitate to make a little donation for the app.
We want to make this process a little more involved, so we are working on implementing a live funding meter and various possibilities to donate for, so users can explicitly designate what they find more important.
-SkCombat development team.