Nothing new here from me, but nothing wrong with saying things again either
The most important stuff for me is more sfx for hitting stuff and making the races a little more interesting to go for (adding awards)
Also, the main multiball could use a little bit more rules or rewards. (I like that it has values based on the races but just hitting all the shots once, then repeat is a little boring) things like add a ball or extra ball would also help here but mixing up what you need to shoot for would make it far more interesting.
I would like like some more callouts and sounds in the Main multiball and the 2 wizard modes and Red Mist. The road to them is just fine but the award for getting there is a little uninspiring. (love the intro with the medals, though)
This all might sound like huge amount of work, but just a few small adjustments would go a long way. The rules for the modes (races and challenges) is already good and don't need anything added