I visited the site on mobile and it doesn't seem to be mobile friendly (in my browser). I suggest you to have only one menu button, it's a bit hassle and confusing that we have 2, the one in the upper right corner would do better alone. That's all as of now, I haven't tried other games aside from scratch but I'm starting to like it.
What's your viewport width? There are many sections on Bitplay which can't be made mobile friendly, like games which got fixed width sprites, quests, etc. Still Bitplay works fine at ~500+ px width, you'll find that forum and other text related materials are still mobile friendly. And of course it would feel more congested on a mobile to have 2 menus but it is perfect for pc's or tablets, I take this into consideration and try to have some redesign to make it more mobile friendly.
More new security updates have been implemented, and an additional game is under development for Bitplay, (hint: a quiz kinda )