Thanks so much for the kind words! Unfortunately collisions are not in this version (yet). I want to add them in eventually but for now the newest version is strictly a rendering/graphics engine.
You can, however, import the collisions scripts from v1.1 and add them in yourself if you so please.
I changed A LOT since version 1 (for the better IMO). The old methods have been deprecated and are no longer supported.
I apologize for any inconvenience this may cause when trying to port.