I think the game is pretty awesome. Playing a private match with some online friends is a lot of fun and doesn't even matter if you're getting credits or not. The only thing I would like to see is after each private match, the users are taken back to the private room so they can chat. Also the private matches should be able to choose the map they want to play.
Some other things that would be nice are team play, and a shorter time for energy.
The game is a lot of fun to play, and if you've got the will, you can play the game without spending any money and still have a lot of fun. It takes a little more time to upgrade, but there are already so many people playing this game, you will always meet up with others your strength.
Feel free to add me to your Plus+: inblack