Maybe you should use some more colorful bullet patterns, sometimes bullets overlap, and when they're of the same color, it gets hard to detect (wave 3 of 7-5 for example)
2 questions.....what's the time required for gold on track 3 in the snowboarding minigame? and how do you start the generic quest? i suppose it's related to the generic stone and generic ice i found..........
A 1.10 multiplier would probably be enough for 3 stars in that situation. You were close!