I have to admit that this song might be very slightly cheap, but it's always good for a laugh and smile. The lyrics are just so well done, and I honestly like your instrumentation more than the original's (although I have that too).
It's just delightfully timeless, and I look forward to more epic songs now that you're back.
Best line: "So the best you can hope for is diee-eee-eee in your sleep." I'd never have thought of making it actually sound like the polymorphed sheep baa-ing on top of the usual rhyme. It's a bit morbid, but that's actually part of the charm.