I'm not planning on doing an android release.
I don't know about any walkthroughs, but I can give a hint for the endings.
You'll get a final score based on both tests and the group project. 72 points max for each (total of 216). Your ending is based on your final score, with following thresholds:
216 (A+) -> Ending 1
180 (A-) -> Ending 2
126 (B-) -> Ending 3
72 (C-) -> Ending 4
Anything below that -> Ending 5
