Had a look at it and noticed the shadows are somehow enabled with the low detail option which is most likely what makes the game lag out. I'll upload a new version for that as soon as we have the fix ;)
And by the way I think you should remove the clouds It appears overdone and covers a lot of the screen and the new combat gameplay take kinda alot time i like the old combat gameplay but the new is fun to maybe it will take me a while to get used to it
