It's okay for just using Space Invaders assests.
Author Comments
Earth Invaders is fun shooting game suitable for all ages. Defend the EARTH from invaders and become a hero. Five levels of fun, no time limit just fun. Have fun playing.
Nice Space Invaders clone, but why is the ship going to the upper right corner once the level finishes? I would also add configurable keyboard controls (not just shooting with the mouse) and/or an autofire option.
Cheerio!
M