Is there an opt-out option for name in credits?
Besides, it is on lower backer levels, too, so this will be a lot of names...
a few generic hints
Advertise the campaign in all places where it might fall on willing eyes and ears. If I wouldn't check by here once in a while I would not have noticed it.
Respond to questions (and make a FAQ if they repeat, e.g. about the Android version).
Don't go too high with your goals; finances must be realistic of course, but you don't yet have a big name or a super-popular topic that automatically draws in backers. The demo is a good idea!
Have attractive rewards, attractive stretch goals (that are not based on antifeaturism),
To explain the last point:
Enamel pins and other little stuff could easily be seen as something that you could also obtain in masses at any exhibition, as promotional gifts. Yes, the logo is "unique" here, but still... I know it is not a cheapo-pin and small-scale production tends to be more expensive per unit. But spending 150 vs. maybe 50 dollars is quite a difference.
Toggling facial hair as stretch goal for several thousand dollars? That is more like you want/don't want beards and the likes? Feel the pain? Then pay to be released from the pain. Doesn't feel that good to a potential customer. Especially because this is easily achieved since most artists use layer technique anyway, so you just create a spearate layer for the body hair and switch it on/off ingame or once you export the sprites. Something that delivers actual content is a good addition, of course and we can understand that this needs more working hours and thus money.