Really quite fun and polished gameplay!
I liked the balls behaving differently. Just intuitive-wise I would have thought the normal golf ball (being heavy and physical) being able to push a button/spring over a ghost ball (something I'd expect to may not have physically manifested and potentially rather ignoring real object interactions).
The main menu and ingame option to mute sound is really handy. Just with the ingame burger menu, I clicked it after playing plenty levels already and didn't think it would cancel my progress. I expected it to either ask to return to main menu or in best case open a pause menu, i.e. with just audio sliders or credits or so.