I like the game mechanics a lot!
This game has a great concept and pleasant background music. However, adding more sound effects, updating the user interface to make it more futuristic, and improving the art would make it a remarkable and long-lasting video game. Having multiple levels to beat (planets) would also be great.
Additionally, it's essential to have a memorable climax that players will enjoy (destruction).
Overall, this is an excellent game idea that needs minor tweaks.
NICE.