I really love this game, it's a ton of fun. If I had any feedback, a tutorial would probably be really helpful, since it's not really clear at the start what you can actually click on. After that, I'd also say that I kind of wish your level going up didn't also increase enemy spawns. (as in, I wish it went up over time instead) Before I realized that was how the game worked, it played as this really cool time management thing where you had to choose between increasing your points by clicking on the planet or by defending the planet by clicking on the enemies or spending your coins. So I was frantically clicking on the planet to get more points before making tactical decisions about when to start spending my time doing other things- it was really cool and had a lot of tension. But once I realized I could slow down the enemy spawns by just not clicking on the planet as much, the game got a lot slower and easier, and had a lot more waiting time where I wasn't doing anything, which I enjoyed a bit less. If your vision was a more relaxed experience, that's totally understandable, but I think it might be worth experimenting with having the enemy spawns be tied to a timer instead of your level, or maybe even just adding another mode that works like that. Just my two cents, although as is it's still a great game and I'm a big fan.