Thanks for the detailed feedback! These suggestions are very handy for the game feel, especially the UI and Star indicator. We thought it would be nice if the player always orbited the star, so they could just hold the down key to head towards it, but that probably isn't intuitive enough so we might try and improve that. Physics wise, I definitely get where you're coming from with the star and chunk friction. I actually increased the friction specifically for chunks to prevent the player from just slingshotting them into the star, because I thought getting close to the star was part of the challenge, but if it's more fun to also slingshot then we can definitely consider reducing that stopping force.
I'm very happy to hear all of these critiques, and we'll try and improve the game whenever we can. Thanks for checking out our game! :D