I feel bad for you really, it was nice of you to actually support a project you like. But like you said, the update progression is atrocious. I remember playing from v0.21 and since then it's been close to two years and there's barely new content.
Even now we've all been waiting for quite a while now and whenever the update does drop, we'll end up with like 2 or 3 new scenes. I'm certain making a game like this doesn't require half as much time to drop such small updates over such long periods of time. The dev is really, straight up lazy. That or is casually working on a updates at just enough of a rate that people continue to support him. Which really sucks cause this one of my most favourite games ever, nothing else like it really.