I have Pocket Genesis and when I load Sonic the Hedgehog it will come up and I can play it bu it runs really slow. Also I cant get some other games to run. They shut down Pocket Genesis. What can I do?

...wait for a new emulator to be written/that one to be updated....
...failing that you can go into the video - "options" and up the screen refresh rate to around 190 or so (this'll speed up the action, but it will get jerky)...also you I've used turbo tray to o'clock my Ax - whcih helps with speed [use at your own risk though] -
Pocket Genesis isnt perfect - it only seems to work with some roms* , but its the only game in town so until its updated , or someone writes a new one you're stuck with it

___________________________________________
*-Rom disclaimer-- Only use roms you own (i.e. you have the original cartridges/disks for ...so get yourself down the second hand shop if you want to play sonic/metroid/whatever ...unless you want to feel the wrath of [insert Heartless multinational console manafacturer here] that is...Remember piracy makes mario cry kids....that is all