Hello, I've been trying out gnash hoping to play all the games I liked way back when, but I noted that a good deal of them suffer from the same problem.
As far as I can tell from the log, the lack of AVM2 support is causing the first two frames to loop, which makes playing games problematic :P
I won't claim that I'm particularly knowledgable, but I do hope that I can at least get some work done.