This is really cool! Played it a bunch of times and though it is rock hard, it was very addictive!
The parcel throwing mechanic is pretty devious! In my first 2 playthroughs I could not do it for the life of me and through there hard to be another way. Over time though I kinda got used to it and got what was probably close to a 50% accuracy rate.
The different annoyances, items etc are hilarious! The plane moving was just so frustrating, and floating when holding the planet was a massive surprise. The ending was always hilarious!
I did encounter a bug in one playthrough where the plane just stop registering everything I threw in it. Don't know what happened there exactly (it was after the plane moved) but otherwise things worked well!
Managed to get a top score of 22. Really great experience!