This has really fascinated me. I liked the originality of the whole idea, and lets face it: Planets exploding are always nice. As to put some sorta structure in this, I'll list what's good and bad.
Good:
- Great variety of weapons
- Interesting and well working concept of the rotating planets
- EXPLOSIONS
- Big map
- Fun gameplay. It really is loads of fun
- Charming credits
Bad:
- Rockets are overpowered (I beat the game with half the planet full of rocket pads, the rest was shields which I didn't even upgrade. The rockets pwn everything). This also kinda destroys the variety of weapons, as you don't need nothing else except the rockets
- Quests. They are a nice idea and a good way to earn money, but I got lots and lots of quests in the beginning (almost every turn), only for them to disappear completly towards the end of the game.
- Difficulty. I never felt like this game was really challenging me. There were some rough spots, but nothing that made me even drop to red health. Maybe that was due to the rockets, I dunno.
- Finding things. While it is very unnerving to spend loads of money on the exploration of alien technology, only to find scrap metal, this also creates a bit of a flaw with the game flow. I found myself often completly broke because the explorations would cost too much, thus not allowing for any upgrades. This is also true for the green neutral planets, as the money they might give gets very measly to the end. 37 Credits really isn't something to write home about when you get over 2000 for 'splodin' a planet.
All in all this was an awesome game, it just needs a few tweaks when it comes to game balance.
Also, I encountered a bug:
When the rockets split with the split bonus, they sometimes start going of into random directions (most likely upwards), thus not even getting near their destination.