My best score: -34 003but, I've ridden bullet bill all the way to the end of level 3 and 4, so it's higher that should be :)
Nice! Yeah, you can 'glitch' your way through the level, but then your score would be low (or even negative). I think that the fun part is to memorize and master each level's "Unexpectedness" and score as high as possible.
Anyway, thank you for your feedback!