Not my type of game.
This is a good game but I got bored by wave 9.
the only problem was the lack of boss fights as turkatim said but other than that it was great
I was almost sold...
I lasted much longer than I expected (due to earlier reviews), but it was just not as good as it could have been. I was really excited once the meteor showers started coming from two directions, as the earlier meteor shower levels were just tedium. However, what made this game not good for me was when after the manta ray alien swarm, the game saw fit to leave me with one bar of health, and with no health or shield power-ups. Needless to say, the aliens that shot 6 balls in a ring killed me quite quickly.
Also, the lack of any boss fights detracted from the score.
This was everything you could ask for in a traditional shooter. The gameplay is fast and addictive, the enemy variety is great and weapon upgrades are awesome. Hope to see more games from you!
I think this game is brilliant! On a par with MutantStorm indeed - it was the most addicting game I've played in a long while. Keep up the good work!