Seing the demo, I cant think one reason to call it an "RPG engine"; It's more like a 2D GUI - since you don't have NPC controls, You cant use anything on your inventory anywhere, neither pickup, move or drop objects; there's no conversation routines (or anyone to talk to) - it's just a 2D GUI with some windows here and there, and some mouse/3D object collision (which can be done with a simple camerapick).
So - judging by the demo - you don't have a finished object/inventory system, a NPC system, a talk system, an enemy system, a fight system, a shop system, a "player attributes" system, a magic system, a weapons system... it's a long way to become an RPG engine.
Worth the $10? I don't know, maybe it is for the 2D stuff - but for sure I wouldnt call it an RPG engine =P~
So - judging by the demo - you don't have a finished object/inventory system, a NPC system, a talk system, an enemy system, a fight system, a shop system, a "player attributes" system, a magic system, a weapons system... it's a long way to become an RPG engine.
Worth the $10? I don't know, maybe it is for the 2D stuff - but for sure I wouldnt call it an RPG engine =P~