Ok my take on all of this :
i get what jangu is saying. the younger generation is learning to appreciate the magnificent indie games, and jangu's kids playing what he is playing is a nice way fro them to bond even more.
But Jangu 5 and 7 are WAY too young to handle a physics game. But kids learn and adapt really fast, faster than adults.
The only way to make the game easier is to take out all of the physics part and make it an arcade game, which immediately the game will lose all of its appeal.
Let them try a little bit more and with some positive feedback, encouragement and help from you, you will see their faces lit up when they will learn to handle the craft without crashing.
And then again gamers nowdays are so pampered. They have it too easy. Hard games build character.It is better to have it hard in the game than in real life.
About the testing part. What A Not so broke Miner proposed is a good idea. Maybe adding a simulation service in the station, where for a small fee, players can test new crafts and equipment.