Not that goood

Why I am saying this isn't that good is because you downloaded the engine which is ok, but you have not understood any of the coding, where is the springs the higher platforms? all you have done is just taken the engine just thrown in the floor objects and hoped for the best, I have tried this engine myself, and managed to make a full city with springs, skyscrapers etc, you need to take more time in actually working on this engine.