ummm.....EH
the game is good, i liked it but it could use some improvement. starting with:
1. when the game has loaded and all, a sign should come up saying: some content is only available at NULLL GAMES would you like to continue? clicking yes will open the game in a new window at the null games website and clicking NO will let you continue to the main screen where the options new game load game etc. are available.
This will avoid disapointment later on in the game when everyone will find out that only certain oppents can be fought at null games and all the progress up till now was for nothing making most players think F*** MY LIFE and closing the browser and waiting 2 days to make the same mistake again (like i did -_-).
2. try chnging the enimes a little more, after a few lvls the only thing differnt is ship colour and if the ships look differnt on the ''choose which ship to fight next map'' then they should in the actually fight. this could reduce the time taken for a gamer to get bored, you know? that suspense of how the next fight will look like and how cool the ship will be and bla bla bla.
3. give the enemy more power please, after the first 2 fights i developed a technique that was going to ensure victory every fight. give them special attacks to and add more specals to our forces aswell, like laser cannons and more bombardments and also other then upgrading the main defense turrent add more turrents?. also i think there should be more than 1 skill point gain after a match.
Thats all i can think of so far, do whatever improvements you want or that are easier to program... or whatever your the maker :)