I played Super Metroid quite a bit during my week-long trip to Wisconsin and found a couple of minor details. For some bosses, you'll need to change the BG layers to 2031 in order to see them, but this sometimes makes the HUD invisible (energy level, missile count, etc). Still playable though. Also, the issue where the background lags for a second appears to be present in "No Vlbank" mode only - setting it to Wait Vblank fixes this, but this often makes it too slow. Otherwise, I'm finding the game to be very playable. Like was previously mentioned, a few of the priorities aren't correct, but I don't find it to be that much of an issue.