Depends on how many polies the characters have, duh. =P I think it was just over 2000 for the total scene, so including chars, but a bit more if you use planar quads (which walls will likely be) or maybe even Ngons. ... rummage rummage ... According to wikipedia it "has a set limit on the number of triangles it can render…
Recommendations are usually to stay around 30. And that's for laptop/desktops, not really for mobile devices. Around 15 bones for a mobile device is more reasonable. 3 per leg, 3 per arm, 4 in the tail, 3 for the spine and 1 as the head - something like that.
OMG you need some <3 and we missed giving you here are ideas 1) seams! fix them 2) some ambient lighting 3) edge quality needs more finesse 4) more subtleties to hide edge