This is well done. It is simple, but does a decent job of conveying what is needed. The controls were simple and easy to learn. It would be nice to see the thrust from the main engine, similar to the RC thrusters showing, but the bar at the bottom does give you enough feedback to play. It might also be worth considering adding a fuel gauge for the RC thrusters, perhaps as a difficulty option. I found myself using RC thrusters to save on fuel. It may not provide lift, and can be slower, costing time, but it does provide a nice amount of movement and was very useful.
Sound may not propagate through space, but if you are supposed to be inside controlling the vessel, then the sounds of the engines, and impacts, should propagate through the ship. Was a nice way to say there are no Sound FX though.