There's some game recommends in the 'Android on Pandora' thread
But aside use on Pandora, here's some of my favs.
Casual game apps:
Super Stickman Golf
https://www.youtube.com/embed/pL3OZoaSfUQ?feature=oembed
Probably my most played game on Android, got all golds on the free app then d/l the paid Pro version.
Well worth it.
If you played Trials HD on Xbox it's close to that I'd say.
Great game, the music in that clip to me is a bit annoy, it ain't in the game I guess the uploader added that.
As for emulators, I have a few and they all run nice for me, except N64. Bit fussy on which roms will load at all I found.
The guy who makes these premium emulators is very good I think
https://play.google.com/store/apps/details?id=com.PceEmu&hl=en&referrer=utm_source%3Dgoogle%26utm_medium%3Dorganic%26utm_term%3Dpce+emu+android
...that's the PC Engine one, he does a great Megadrive one too, and others as you'll see on that page.
I found those ones worked well with iCP too.
All the emus I have work with my Xperia Play too, the dpad at least... I'm not bothered about the touch pad controls really so suits me.
Other emus I have are
Super GNES
SNES Droid
SNES A.D
John NES
MAME4Droid
Marvin ...a decent Speccy emu
MD emu
UAE4Droid ...Amiga emu but only use for one game
2600 emu
N64 4 DroiD
All which work nice I find, though I'm not 'that' fussy I don't think, if it works well enough I'm happy. Others might comment that framerates aren't spot on or something but this is not something I'd notice unless it was real bad.
Besides the N64, and can't really comment on the UAE as I use it for Xenon only...
All the others play any game rom I've thrown at it so all good in my eyes.
Plenty YT clips of each emu if you wanted to search the name more to see about speeds or whatever else
I think we Android users are well covered