Bad quality and GUI button not working

Hey, i had a 2 questions,

First, Why is the floor/wall such bad quality in my game?

And second, why doesnt my flashlight button work on android? it works in the viewport.

Screenshot of my Character blueprint (Screenshot - 62f775bbaed65ed61b31dbbf590ffbf5 - Gyazo)
Screenshot of my Flashlight GUI (Screenshot - ee0963f4a64effaaa3ff5274e1dcc2fa - Gyazo)