[2021] Did RuneScape just brick my iPhone 12?

I was playing Runescape on mobile earlier today, and when I went to go to the PoF, as soon as I harvested one of my Zygos my phone just went dark. A few seconds later, it came back on but my display had a light green hue and in the hours since it has gotten worse and worse to the point where my phone is completely unusable.

Now, I'm not saying that RuneScape necessarily did this, but is it possible that it was running so hot that it damaged the iPhone's internal systems? My phone is less than 2 months old, it has absolutely zero physical damage, but the display seems totally shot. I haven't dropped it, dipped it in water, etc. I've never had an issue like this with an iPhone before.