Could you describe better which issues need to be solved on mobile and what would you do ? The web browser app is without javascript so it is safer for the user but user experience is limited.
As I mentioned earlier, the UI and design needs to be improved in order to make the site look more appealing. Text on mobile appears out of place in certain sections which needs to be fixed too.
Also, try adding more cryptocurrencies so that players have more options to play with. This also helps with minimising TX times, fees etc.