What version and what platform are you on, and can I get any more details beyond "it's stuck" to look into?
Did you get any output file anywhere? Also, that seems to be an ultra-budget sub-$100 phone listed with either 3 or 4 GB of RAM. Given that and the scathing complaints I was able to find about it on Reddit and other sites making it clear it's not a phone that can do gaming, it might simply not have enough memory to run a Ren'Py visual novel, especially one with larger assets like re:Dreamer.