Thanks! The computing is probably a little too kind, you can get a 75% thanks to only one piece if you meet to conditions. It was made with the intent of not being to brutal but now it's too generous. I think I've found a better way to calculate the score that is more fair and close to what you got, but that will be updated only after jam.
It's very tricky to decide what should be the score, there's no good or bad answer, it's completely subjective, you choose what's "near" and what's "far". Definitely one of the hardest design decisions you can face as a game designer.