Very relaxing experience with a surprisingly high skill ceiling.
Using W to "propel" the player sounded like a pointless mechanic at first, but as it turns out, learning to curve around rocks by balancing between "propel" and "pull" is very satisfying.
The game could have used some extra objectives, such as collecting coins, reaching checkpoints, etc, in order to encourage players to move around more and reward skilled players. And the tether could have changed colour when pushing or pulling for some visual feedback.
Other than that, it was a fun game! Good job!