Suggestions for next code update???? I have a couple:
Don't kill the GI in when mystery is awarded in multi-ball (or any other time balls are in play).
The flames in the back don't work if the insert brightness is set below 100%.
Upper playfield target is too strong during modes (too easy to bash it and defeat monsters). Maybe require a loop to qualify a hit?
Allow a grace period for multi-ball end (when hitting the 3rd lock for triple knights challenge while draining in catapult multi-ball).
The Black Knight goes "nice" too fast, currently after 2 monsters defeats. This should happen after maybe 4 defeats imo.
Really fun, addictive game. Other code thoughts?

Change your pitch just a bit (either steeper or flatter). It can help sometimes!

Yes, I found this a month or so ago and reported it on here somewhere. Hopefully it can be fixed with software.