This is the game i made. The game would not open on my S3, just black screen. Flappy chicken worked with my S3. I’m not sure if my Samsung S3 is too slow or what.
I appreciate if someone could test it for me on their high end andriod phone 
Thank you
for mobile games in ue4 you will want to probably disable some of the default features in the engine, tappy bird does this for example.
take a look at Performance Guidelines for Mobile Devices | Unreal Engine Documentation
Hello proxsky,
Also, in addition to Botanicvelious, have a look at our Android Device Compatibility. Android Support for Unreal Engine | Unreal Engine 5.1 Documentation
We don’t recommend developing on any device older than an S4.