its an ok game. well in the sense that the graphics appear to be your own so well done, however its extremely unoriginal in the sense that its space invaders without a scoring system. To improve this game perhaps add different levels where the ships are in different formations or move differently than just the standard side to side. or perhaps if you added some sort of power ups? another good idea would perhaps be a special two player mode where for example you could have one person who moves the player and the other that shoots or having to player controlled tank things(for two friends who want to play on the same computer). all in all I think the graphics are fine but the game doe require alot more features before I would rate it any higher. it would also be a good idea to add a pre loader and some sort of finish screen when you have won the game. in summery with a bit more work you could create a new faster paced modern version of the classic space invaders game that i'm sure many people would play for hours including me, if you add some more features and polished up the whole thing with some cool music and sound effects, upgrades/levels etc and definitely a pre loader i can see this game becoming quite popular. you just need to find a new angle that captivates people. :)