It's an interesting concept. But it is really difficult to maneuver the ship on landing. Often times you return, sometimes drifted out.
And when you managed to ge close the planet, I don't feel the air resistance that slows the ship. I tried to slow down, but it still crash. I am probably doing it wrong. There is also risk of going out of the planet you are trying to land, until you ran out of fuel. Then restart back to 0.
If only we have more fuel capacity, then players can have more time to get familiar with landing mechanism and eventually get it right.
Nevertheless, I think this entry is great and original. Good work.