I downloaded the demo. Turns out space flight is hard. Who knew?
EDIT
The demo is fairly substantial, even with the limited number of parts available to you. I've been playing for hours and still have goals to accomplish. There is a good taste of the singleplayer part of the game, where you start with the minimum to build a rocket and have to "build" your way up. There are lots of "accomplishments" to reach, such as highest top speed, first time to various heights, etc. On top of that there are missions you can take on. The last one I did required me to get 2 tourists into sub-orbital flight (break atmosphere at 70,000 meters) and return them home. Took a few tried because I took 2 tourists plus my pilot up all at once. Since the demo only has the 1-seater pod I had to stack 3 of them on my ship. This is fine except when returning home its harder to slow the stack of them down in time to deploy the chute. I needed to reserve some fuel to slow myself down as I was coming into the atmosphere, but also leave enough time to jettison the fuel tanks and engine before it got too hot and exploded. Good times.