Hi, first thanks for playing the game :)
First, don't use the html, that was experimental, i just removed it from the files. There is a Linux version though, you should use that. Then you will have sound and probably smoother graphics.
For the turn yeah, its switches too fast so its a bit confusing. I put some particles around the frame of the current. But i also forgot to initialize that at the beginning of the fight so now it always start at the position of the last person on the last fight ... yeah... stupid little things :)
The mana is restored either when you enter the sanctuary or if you take a lvl
I was planning on putting the skills info in a tooltip or something, didn't had time for it but yeah definitely missing