For me the controls were simple and it was easy to grasp while the core gameplay was simple yet attractive. However, the lack of an aiming sight or signs that you are interacting with a meteorite may be confusing in the beginning.
The art was simple and beautiful, you can tell very clearly what is the goal and the means to achieve it, though I would have like the immovable meteorites to be a little bit clearer.
Besides that, the only other thing that I found, which I am not sure was intentional or not, was that you could shoot a meteorite over and over again, even if it's already flying. This makes the games sometime a little bit more like aim and nudge the player a little bit each time till you reach the goal.
But overall, the game was fun and I had pleasure playing it