Link area/Button not working in mobile touch devices

Please find below link

for which i have setup the same thing on another webpage wherein i couldn’t able to get button working for mobile device. Also please also give solution to work button area to be same for all devices rightnow clickable area is working for desktop site for 1080 pixel resolution but once canvas is bigger or smaller in size the position of clickable area is not at the central part so guide to fix the same.
also i want custom cursor for clickable area so guide me to setup the same.
Thank you.