The sword model was pretty cool! I also liked the volcano level design, the dragon flying out of the volcano and coming down to fight you, was like something out of a movie :D (it scared the crap out of me too xD)
One side note, MetaWar.exe seems to not work, it kicks me out of a level after a few seconds, but MetaArena.exe seems to be a working version of the same thing? It might be good to leave a line or two on the game page about that :D
I also encountered a few bugs, the dragon seemed to loop its death animation after I killed it, and also I made the save.json changes as you said on the game page, but I still couldn't get the crystals to work.
If you get time, check out the game I worked on :)