Well, the game doesn't require clicking, but PJ64's fullscreen mode covers up the bezel, so I tried to move the window around to fit in the frame better.
By "stops responding", I mean that thing in Windows where it fades to white and says "not responding", then it closes out. I have to reopen Launchbox entirely.
I just tested it with an NES game in Nestopia, and the same thing happens there (though there's much less need to click there, as unlike PJ64, Nestopia's fullscreen is UNDER the bezel like it should be).
One more thing, how do I... exit the game?
I just installed it, and it works IF I don't click on anything. As soon as I do try to click, though, Launchbox stops responding.
If it matters, this is on Launchbox 13.12, and this happened when using Project 64 3.0.1.