Reduce processor demands
My phone which is an iPhone X heats up pretty quick shortly after I load the game up. It affects my framerates which is most likely because of my phone’s processor heating up. Not even the most graphic heavy games I have on my phone like COD mobile heats it up this much and quickly. Can you look into the game and see what’s causing it to make the cpu work so hard? I don’t think your game should require a lot of processing power.