Nice entry!

The concept was simple, but well execute, and the addition of moving platforms and buttons helped add some interesting complexity. One thing that I think would really help to improve it would be some indication of how fast your ball is moving, perhaps through a trail. Changing the ball texture to have some features, like stripes, could help create a sense of rolling, which would also help with this, if you've used the unity rolling physics. It might not seem like a huge change, but there were times when it was really hard to gauge speed and slow down appropriately, especially when flying through the air, and it would really help there.
Other than that, it would have been nice if arrow keys were an option as well as WASD, but that's a pretty minor complaint.
The music was good, and fit the game well, and the graphics were nothing to complain about, especially given that it's a jam, and you've only got 48 hours.

Overall, great job!