Seems as if 1.1.2 at least has a third stage. But yeah, I remember getting it ages ago (granted I did not pay for it), and thinking that it must've been a demo. Forgot which game it was and tried it again yesterday, and again was wondering if it was just a demo, since it lacked monsters shown in the pictures on DLSite.
But yeah, here's to hoping he releases a proper full game some time soon then. I feel bad for all of ya'll who bought it and has been waiting for the rest of the game for two years :/