Hello dear developer of this game.
I've been playing this game for a while and ended it after a while however I have several suggestions related to overall game performance and support.
I recommend using api 19+(android 4.4+) as I tested this game on Android 4.4 device and it worked fine(overrode through special permission)
The game works fine for most Android versions but the loading time sometimes takes up to 20 seconds(on MT 6752 CPU)and I know it's because of Unity, so I strongly recommend to port the game to Godot engine as it will work much better with such type of game also porting is easier for Godot.
Also why does this game use OpenGL shaders?