There's almost nothing to Merlin Demo! It's a "4x4 walking engine" test and an intro movie, both selectable from a menu.

I can tell from some scenes in the intro movie that this was going to be a JRPG, but there's no game here to tell for sure exactly what it would have been like.

Some of the graphics are good. You can tell that Conroy wanted to make something that looked fancy enough that you can't tell it's a Megazeux game. Some of the results are impressive (screenshot 1), some are hilariously bad (screenshot 3).

Overall, probably not worth playing...