Nice game.
I couldn't figure out how to do Pluto (ended up with 42, the extras being in the third room), though I did realize you can skip doing the puzzles properly by just bringing in a ladder/jetpack/key from an earlier room. I opted not to since it felt like the requirement was set to not need to do that.
I wasn't sure how to solve the jetpack revert puzzle so I just snapshotted and refilled my fuel in midair. The specific rules around when a dropping an object makes it not come with you are really confusing and I don't actually get them. Like, I was able to bring a ladder with me to get to the second trophy (although not a green key because they've all been spent... could get around that by reverting the respective green door open commit, but I got too lazy) but when I tried to bring a jetpack or trophy it just didn't let me for some reason.