There is a new update that fixes the problems. It does require a uninstall and then a new install. You will have to copy your saves out before you uninstall.
The way I got it to work is by using a physical computer mouse. Click at least once, then touch controls will work, however do not unplug the mouse, otherwise it will freeze then crash. Renpy is really sad on mobile, if a developer has to have custom or unsupported events/scripts.