Idle games are not my cup of tea but I played with a friend that loves them and he thought it was cool. The game has potential. The only thing we found missing is something to do while we waited (like clicking something). We found something but it felt more like an exploit. We kept spawning planets at the edge of the line and threw them directly to the sun to get points.
Overall I would say the game is a cool "spin" on the idle genre (hehe).