I love the emulator been using it for quite sometime maybe 3 years. I ha e to gripes though ...the screen cuts off the image at the bottom so I can't see whats going on. For instance SSF: The New Challengers I cant see the super meter on the bottom.
My 2nd gripe is the save/load states. They more or less work...for certain games. I can't play an RPG/JRPG game cause it will only save at a certain point. So when I progress from that certain save point I can't. Even if I choose save state it will load the previous save state and not a new one. So whenever I come back to it all my progress is gone. Sometimes I'll double check before I stop playing and it will load the current save state but if I exit the browser it's like it gets deleted and the previous save state is loaded.
A shot in the dark, not sure of you're still doing maintenance on it.