on the LG K40s it may be poorly optimized, because during gameplay it gets stuck and lagging, my brother's oldest cell phone runs perfectly

I think it's poorly optimized for the LG K40s, mine has 3gb of ram, and when I'm playing, it crashes a lot, I put the rendering and graphics to a minimum, but even so the experience is not good both in beta versions (which I would even understand the crash) but also in official versions, this has been happening for a long time