thanks for the feedback 40W.
i should have made it clear that, at the start of a given level, the ship will direct toward wherever you click/tap. IE, launch in that direction. once the ship is in orbit, it will revolve around the planet; click to escape orbit at the ship's current velocity. ie, the angle/direction that it's currently moving in. i hope that clears the controls up? i've edited the project page to make the controls a bit more clear.
otherwise, thanks for playing :)