If I had a recommendation for you, I would say to allow rotation to go further on it's axis. In a space game like this it feels weird to hit a hard axis lock when trying to reach things. Otherwise the controls are pretty interesting, it's not common I see a game that exclusively uses keyboard controls. Another issue I had was that using multiple rotation controls at once (like up and left for example), it wouldn't actually do it. It would just choose one of the directions, or do neither.