I tried this on a friend's computer. After making 30 or so runs, the difficulty curve far surpasses the ship's improvement. For example, as soon as you get close to having $5000 credits or get into sector 4, the game starts sending in interceptors and capital ships. Needless to say, you're wiped out in a few seconds and have to start over again. This is a constant, so there is no point in trying to play anymore. I'm glad i got to try the game on a friend's computer first, as I will definitely NOT buy this one.
