Newer Sega Master System Emu needed

Is anyone currently working on a new SMS emu. Yoshi never finished the one he did..

Features that would be nice:

* Same sort of navigation as NesterJ
* Good sound support (Not fast or slow but just right)
* Widescreen and larger screen(Again Sorta like NesterJ)
* Speed up function
* Check Battery Life

The reason i am posting this just that i am not a programmer and i simply adore sega games. Just that Yoshis version doesnt scroll properly ,made for 1.0 , sound is crap and it is all stuck in one little box with a distracting background (Deleted)

Please make an emulator someone!

Thank you very much

Wally