Moving/Resizing The button on the banner for mobile

[ShineBright-]

I am trying to move and/or resize the button on mobile for the banner and would like some help, but I really like the look of it on desktop, so could someone help me? I also would like the image size to stay the same and not having to scroll to see the full image 

Website:ShineBrightSmile.au

Password: ShineBrightSmile123

[TheBluestSparkz]

Howdy Shine Bright. If you shine bright , maybe we can slam our heads together and see what markets to monopoly. Had me at your name .