Hot game, love what you've done so far. Just hit a snag on mobile though.
When you access your phone or receive a call, the bottom of the phone goes past the bottom of the screen meaning you can't move forward in the game.
Good observation, I thought the scrollbars appeared when the resolution is lower. What is the resolution on your phone? maybe I can try to replicate it on an android emulator and see if I can come out with another solution.
EDIT: It seems the smartphone is really buggy on lower resolutions, even with the scrollbars. I'll investigate this on the weekend, thanks for the report