Nice!
I liked it, it is very original. It got a bit boring and here is my advice: edit it a bit and insert some kind of flight phases. For example, when the rocket flies about 20% of the total distance, the player must insert some kind of code to activate something, lets say some kind of thrusters, and keep the rocket steady at the same time. The graphics and programming were very well done, overall, it's a very nice game. Keep experimenting with original ideas, good luck to you !