Note: This did not work on my computer. It crashed after the choose character thing. I then used my friends computer.
Problems:
-Jazz doesn't move smoothly downhill
-Jazz can't run and turn
-The dragonfly goes through the ground.
-^ ^ gets stuck on Jazz
-Jazz's helicopter ears last a short time.
-you can't jump from block to block when playing as Jazz. (Not sure about Spaz)
-bouncers are too slow

I don't want to nag you or nothing, but that's all i managed to find.