Fly with gravity. Or crash.
Hold your finger where you want to go. The rocket turns that way and fires. Let go to glide.
The dotted line shows where you are heading. The contour lines show gravity: the closer together, the steeper.
Crash as much as you like. The wreckage stays in space, and you can fly into it.
Want to leave the system? Fill the gauge top right past 100 % and cross the red system boundary. Pass close behind a planet to borrow some of its speed.
Keyboard: up arrow for the engine, left and right to turn. Sound on and off with ♪.