First, there is definitely a prefab. It's a ship with thrusters. The "SpaceshipThrusters3D" demo. Second, you haven't taken proper English into account. My statement was "amount of prerequisites and bugs" (since "bugs" is prepositional to follow the actual action verb "amount of prerequisites", the preposition "bugs" becomes non-plural). If you'll dissect the actual statement, you'll also see that the third phrase references the first phrase, which describes why it's not mobile ready for non-programmers; the fact that its only set up for PC controls and takes more advanced knowledge of C# to understand how to get a joystick object variable to appear in the inspector. That's the part that's not mobile ready. I will admit, after editing the custom inspectors and editors to accommodate a joystick, I too am quite happy with the asset. I think I was expecting it to be drag and drop ready for mobile. I should make an edit on my earlier comment as well that the other kit doesn't have the Gravity, Orbit, etc. that this one supplies, nor the graphics quality, so we can assume my previous post to be moot. Edit2: Removing the previous version prefab from the demo scene and reimporting solved the errors. The problem was sharedassets metadata I assume. It was creating a Flame and Flare child under each Thruster Parent at runtime which 2.7.5 does not. Thanks for the support.