build app for games web site

hi all i have this web site [login to view URL] what i need is to build app for android which will con do 2 thing 1- paly on this app online ( so we have to add html5 games ) - the game whice will open for one time has to saved on the app 2- download games ( whice i have to add to this app ) to the mobile itself look to the attach ( just simple pages to understand the idea )