apk problems

I’m having a couple problems with my apk. (my game in mobile version) and if anyone knows how to solve these problems and teach me how to do so that would be great, thanks
1.) my stop sign animation will not play
2.) there is a back arrow button on my tablet and if u hit it while playing my game it will take u to the game builder screen

Does the stop sign animation play properly in the browser?

yes it does @grazer

the animation glitch got fixed but not the other one