Really nice game feel, the background music was very suitable and I really enjoyed the UI and in-game sound effects. Here's some feedback about things that I believed could be improved. First of all, I'm not sure if that was the design intention but the game didn't feel challenging at all, it was fun playing around with the planets but it didn't feel like it had any meaning at all. Secondly, I didn't understand how you used the theme, It felt like you focused more on the context of (SDG) it and not the theme itself(STEAM). Finally, one little thing that might be more personal, when rotating the planets with WASD, although they rotate coherently with the direction intended, I expected the rotation to go the opposite way. For example, if I wanted to see a region above the one I'm currently seeing, usually W would mean UP,  but instead I rotate the planet in that direction and see the section below (did I make sense to you?). I hope that any of my feedback can be useful! Great entry anyways guys ^^