39 was my best score! It was almost always a butterfly which got me, too! I had no idea they were so powerful.
I feel going at topspeed the whole is the best strategy, otherwise when you encounter a line of ants you (or at least I) don't have enough time to speed up and clear all four of them.
The art is great, I really enjoyed the intro. In fact, I enjoyed it so much I replayed to pick the other two wishes... and I can't help but notice that food and friends are the same two mice...