Pretty good.
That was pretty good. Reminds me of Defend Your Castle and Demonic Defence.
It would be lots better if you added sound and possibly music, as well as made more upgrades.
Reviews for "Defend Earth"
I hate these types of games.
"Click on the ships multipule times to destroy them."
nice work
keep up the good work
S'ok...
reminds me of Defend ur castle and Demon Defence. add some music. would make it better. 4/5. good effort