Tiny Space Program is a simplified and minimalist version of the wonderful 'Kerbal Space Program.' It lets you start and operate your own aerospace agency from the ground up.
The main difference between Tiny Space Program and Kerbal Space Program -and what's really missing in this game- is the fact that you can't create your own space vehicles. For each mission, depending on what it is, you'll be assigned a specific rocket that will merely serve its purpose visually, since you can't control its trajectory, either.
Your role in Tiny Space Program is to make sure your company is successful and generates profits through space exploration. You'll be the one who decides what type of space mission is best and the expenses you're willing to risk when it comes to budgeting for the equipment. If this number reaches zero, the game will be over.
One of the most interesting features of Tiny Space Program is the fact that it works with completely real and precise scientific data. This makes it the most realistic NASA or Space X experience possible for anyone interested in the world of aerospace.