Ok, it ran ok. But these were the issues, most of them mentioned:
-You have to set display mode at first launch. It launches in a small section of a window otherwise.
-It's made for full keyboards, so you'll be having difficulties using the menus.
-The camera won't move with you. Would be nice to make it 3rd person view.

Download:
http://dl.dropbox.com/u/9280885/SRB2.deb
You'll find it in the menu and in the directory /opt/sonicroboblast2. (Optified, of course.)

What will be your changes with the Pandora version?
Will you add GLES and change the audio backend?
And possibly remap some keys..?