Cool!! It's usually difficult for me to understand this sort of progression/idle mix games, but this one worked for me! I love how you have to defend the planet from UFOS and meteors, which sets it apart from other games centered around this genre, as it's not just the classic 'build, build, upgrade, build, build' endless gameplay loop, but you actually have to defend what you built - lovely!
Now, one problem I had was that when I was still learning the mechanics, I built 3 satellites and found myself hard-locked with no way to earn that blue lightning bolt-energy resource. I had to restart the game and made sure to build a couple of each variety, and that seemed to work until a UFO blew up my only source of energy. Maybe, in the future, consider an 'undo' button or some action that allows the player to reverse an action without having to refresh the page.
In terms of the art and audio, I enjoyed the laid-back style and think it worked perfectly for this game. Nice.
Overall, really fun to play, and while it might be a little challening to grasp at first, this concept has true potential and you definitely presented it really great. Nice work!! 👍