Debugging the controller issue (where your controller is seen, but doesn't work in selected games). Just to be sure, do you have Controller item checked in Interval Odyssey's menubar: File>Settings->Controller ? If it still doesn't work, what about Tetris' controller support? I'm considering the possibility that it may be iframe related and/or specific to certain browsers but wanted to confirm this diagnostic.
Haven't had time to test, I'll get back to you, sorry.