I think your game has a nice concept which i identifie as being "fill quests to upgrade your equipment and explore", and the mood is really nice from music to dialogues. I just think you lacked of code since there is a lot of bugs in the game.
I tried three times to fly to another planet with the upgraded jetpack and even seen one, but the moment you decide to go left or right in space, you're lost, camera don't follow and you might spend dozens of minutes to recover a full and calm view of your character Another real problem is the movements of the character, in my humble opinion they need to be speed up to make your game a million times funnier !
Overall, it's all of what it lacked, art was simple but well managed and pleasant, music was nice and relaxing, and humor was quite exquisite !
I hope you'll find time to make your game better ! Good job !