Dried yogurt on the contacts, perhaps?
Not that you haven't already done this, but I would make sure that the HuCard is truly busted. Are there any visible damage to the HuCard? The PCB is contained in the small, black rectangular portion by the metal contacts.
I don't have a spare copy of TaleSpin, unfortunately. Sorry. But, I'm hoping that you'll be able to resuscitate (sp?) your game.