Hey!
I just wanted to say that I had a great time playing the game. It was simple, but kept me hooked until I was able to unlock all of the upgrades. I did run into a little bug when I was almost maxed out on upgrades - even though the panel showed that I had them all, my stats (health and fuel) reset when I launched the rocket. I hope this can be fixed in the future, but I still had a great time playing.
I would love to see more features added to the game, like more planets, customizable rockets, and more upgrades. However, I do think it would be great if you focused on making the game as polished and high-quality as possible before adding more content.
Keep up the great work and congratulations!