Hi,
Regarding the wonky Android controls, dev has published a hotfix for that in v0.3.2.3.1, please update and try it out to see if it helps.
As for anal, you need to position her in doggystyle position, to do so simply:
- make sure she lays on her back,
- undress her fully,
- raise both arms above head and click around belly to turn her over
- tuck both legs in (start with left thigh)
- choose dick(4) and tap on butthole
- ...?
- profit
Hope this helps,
Cheers