Hey thanks for the feedback! I got a suspicion of what might be going wrong with the improper level progression, and after trying it out, it seems that you can select invisible planets in the main menu, effectively skipping otherwise required levels to reach that one. So that's an unfortunate bug - sorry about that one! I believe the same thing is going on with your progression not being stored... More feedback and polish is definitely needed too, for sure. I'm happy to hear you liked the game nonetheless!
I suppose I'm obligated to respond with an email of my own now xD.
Kind regards,
Octox