A+ name and presentation. I liked the Sonic 3D style courses, too. I think the joined controls detract from the game more than I thought they would. Maybe it's the level design? Especially in the double jump level, I had a lot of feelsbad moments with one ball going off the course when I was trying to get the other into position.
The core concept of "golf except the whole obeys the same rules as the ball" is a really cool idea. I'd love to see that refined and developed. There's some really cool ideas at play here. Well done! And that polish! Well done everyone!