Just uploaded a small update to add in the ability to Quick Restart a level by pressing R and fixed a few issues with camera movement (as well as a few other minor tweaks to various things that are not worth listing in detail). I'm currently working on the final celestial body to be added, the Layover planet. This planetary body allows you to rest, take stock of your situation and relaunch in whatever direction you deem fit, as well as being a checkpoint where you restart from if you fail the level after landing on it.