I have the same problem. And if we're talking about the phone I think that's not the problem. I was able to play the game before with my phone but when I update it to the lastest version, it began to kick me out whenever I enter the game
0.29 did require much work on the code for the battle system, i think only Caro knows about Android stuff fairly well, so i suggest reporting it on the Discord with the model you are using
Game crashed after being open for couple of minutes don't know much probably because my phone (android 11) there's still big storage left so space isn't the issue...
maybe it isn't powerful enough or it overheated, was it after the difficulty select screen? many new phones are having issues because of renpy's update, it seems