It's a fun little trading sim, and it has a nice feel to it with the sounds and art style! I screwed myself over though buying fuel, thinking I could sell it to other planets! Fun little simulation! I could easily see it as a mini-game for a larger game in order to get more cash! You did good! The only difficulty was having the "Buy Menu" sometimes block the way of the planets I wanted to travel to! I also liked the little "Not to Scale" at the bottom of the screen! It was a nice touch.
Thanks for the feedback, I agree with you on the "Buy menu" getting in the way. I should have added on on screen button prompts to show the keyboard commands to select planets. Originally, I was going to have a minigame you could play on the planet to make money but I had to cut it for time. I am glad you liked my game.