>0) does it run at all?
>1) is the music playing (a castlevania midi file)?
Yes, but it tends to lag
>2) does it make a sound when the player shoots?
Yes, but not always (probably lags)
>3) is there ever any severe screen update glitch, flash, or other issues
Yep, some of the player animations are glitchy (when he rotates, or crouches). Also occasionally most of the tiles on the screen disappear and you can see the background through them.
>4) how far down does the framerate go? (it's curently capped at 22fps)
6-10 when the player moves, 15-22 when neither the player nor any other objects move (sometimes it's 15-16, sometimes it's 20-22). That's all on 336MHz - the default clock setting.