This is usually what keeps me from completing projects; some feature being uncontrollably more to manage than what I first thought it would be. In this case, polygon collision detection. I think two or three of my games have been abandoned simply due to this, and I now add another to the list. It even had a working scripting system, sigh.
I should get around to writing a collision library. That, and a user interface library should be very helpful in future projects.
This adventure/exploration game has (sadly) been added to the dump. I don't know what my next game project will be yet.