Yes, you are unrooted because you flashed the stock rom. You will need to reroot, flash your nandroid (if you made it while rooted), or flash another custom rom, to get root back.
I can't speak personally about any triumph roms, but from browsing android Central, xda, and android forums, there are a ton of them. Read through those threads and find the popular up to date ones and try them out.
As for the snes, just give a Google for 'android snes emulator', you'll find everything you need.
Samsung Blaze 4g -- All-Star JB 4.1.2 @1.8ghz
Acer A100 ----- GodDroid CM10 4.1.2 @1.5ghz
Others: OV, MT, Rise, Elite