The art is nostalgiac of old flash games and the ui is nice, but the game is laggy as hell during combat. Can you create an option that skips battle animations?
in not really professional or anything here but i did somethings that makes the game much more smooth.
1) i just added the game to the nvidia control panel's 3d setting (should be same for others i guess) then i switched the power management mode to maximum performance (keep changing stuff there, it may help even more).
2) at the control panel, "detail" section, i choose the game to high priority.
your game may be much smoother by now. atleast, thats what i did to make it work. if you know all of the following, then im sorry for wasting your time.