Archers vs. Aliens
WINNER OF THE STEM CHALLENGE 2012!
To buy the Full Version, please visit ArchersVsAliens.webs.com
Aliens are invading your castle! Defend it by answering math problems to earn arrows! Fire them at incoming aliens to stop the invasion! Try the first level here, and buy the Full Version for 9 more levels, an Endless mode, and continuous updates with more cool features!