Yes, WB / AI / JJ & Jeff have lots of neat little things to appreciate. I always enjoyed finding the hidden levels and items and stuff. And if you have mad skillz, you can speed through the stages... which provides quite a bit of satisfaction.
Which reminds me: SONIC ripped off WB, Joe!
Eat them apples (or bananas, or watermelons, or kiwis, or pineapples, or leechees, or .... )