Aaaaand that's the best game I have played in this jam. Art and sound create a perfect atmosphere. Mechanics are simple but you've found different use cases that gave them depth. The game feel in general is amazing, the character's controls feel smooth and every action by the player is displayed with according sounds and visuals. Honestly, this has huge potential to become a published game in the near future.
One thing I missed (the only one) is being able to hear the echo of the spheres hitting the ground once I thrown them off the cliff. That would have given me some hint of where I should start gravitating. But I am not sure if this feature could minimize your design intention in these level areas.
Congratulations! I will keep track of your game and I hope I can purchase the full version one day.