Thank you for playing, and for the detailed feedback! I agree that the game feel could use a lot of adjustment. Watching you play the game was especially helpful.
Tweaking the numbers to make you feel as though you have more control over the worlds is one idea. We also thought about having small walls on either side of the platform to prevent the worlds from rolling off. As well as making the detection radius larger for matching 3 worlds. Adjusting the weights and torque to make it easier to "throw" planets around is another idea.
There are a few things that we can experiment with if we decide to continue this project. It's mainly a matter of getting external testers, as the view on difficulty is very skewed when you play your own work (I was worried it was too easy on release!). Excellent feedback, thank you!