Mission 3 done. Now we have 10 missions left like the sequel, so this is where the game REALLY begins.
The game desyncs like hell but I did it... frickin' finally. And it's only the first level... woohoo...
Testing this game now with the latest BizHawk build. Seems to sync fine so far, whole 1st level syncs. Tested using the Japanese version, which is faster.