This is a simple SNES emulator I started last month, but I paused it for a while. It runs some games...

Tested working games (with bugs):
Super Mario World
Super Mario All-stars
Simpsons Barts Nightmare (major graphical issues)
Castlevania X (major graphical issues)
Mega Man X (X2 and X3 kind of work...)
Super Bomberman
Boogerman
Megaman 7
Street Fighter 2
Mario Paint
Final Fantasy 2
Contra III
Legend of Zelda - A link to the past
Krusty's Super Fun House

But the most awesome games like Chrono Trigger and some big RPGs doesn't work
The games that are not working are probably due to the lack of the SPC700 APU emulation. Actually, I already writted the code to emulate this APU, but I couldn't get it to work in sync with 65816 yet, so I don't pushed it to github.

Any help would be appreciated.
Source: https://github.com/gdkchan/SNES.net

About the speed: I remember on the beggining, the emulator ran Super Mario World at ~57 fps, almost fullspeed, but after I started to implement more stuff, it dropped to around ~35 fps (at least here) But I think I can optimize it to fullspeed again.