First of all, I would like to extend my best wishes and congratulations to this team for coming to the Bitcoin Forum. Hope you guys stay on the forum honestly without any scams with every customer. I visited your site and saw that you have created a casino site with sports betting. Although it took a while before to access your site, I hope you resolve this slowness of your website very soon. You work in the forum with your honesty, surely you can survive for a long time.
first of all, I open coinplay a lot but until now I haven't experienced any lag as you said, are you using a VPN or custom DNS? because it's possible that the problem comes from your network and not from the site.
I also have not experienced any lag or slowness while opening the coinplay website, so clearly, this is not an issue with the site or coinplay, several things causes a site to lag that is absolutely outside the site itself, and a few i can remember right now is -
/Having several apps running in the background of your computer or mobile device, this causes the computer or mobile device itself to lag, not particularly the browser being used or website that's being visited.
/Having too many tabs opened on your browser could sometimes, cause the browser to lag, and not particularly the website being visited.
/Being low on RAM or memory causes the device itself to lag, which also affects everything that device is used for.
This are just the few i can remember at the moment, so @Rigon, you can check to make sure the lag you experienced while visiting coinplay is not from your end.