Just when you thought you pushed back those pesky invaders in the 1980's, a recent scan has found them trying to establish a lunar foothold for their next invasion.

Fortunately, Earth was able to install a missle defence system on the surface before they could start landing.

Control the missile Defender and blast the Moon Intruders, and prevent them from reaching the surface!

Update Description:
- Added the ability to change the key map (for Zire 21 and Zire 31 users).

**** [Jul 7, 2005] by Mangetout
I like this game - very good and every bit as playable as the arcade classic; the only slight annoyance is that the ordinary PalmOS key 'click' sounds still happen (on my Treo 600 at least).

**** [Mar 18, 2005] by Andy
I love the colours and graphics! Yes, a wee bit slow, but, I don't mind at all. Kind of like the jazz-up version of Space Invaders. Works well on my Tungsten 3. Thank you.

**** [Nov 5, 2004] by Gustavo Garcia
Cool game! It's a pity that on my Zire 21, I cannot fire missiles. Move left/right & toggle sound work Ok. But "Page Down", (the only key left) has no effect. :-(

***** [Oct 14, 2004] by DerCormeister
Probably Jude Nelson's best game to date. I'm not sure that's entirely a compliment considering that this game is wholly unoriginal. Still, all the Space Invaders basics are there and its colors are appealing. Suggestions: make a better background graphic (implement hi-res graphics generally, speed it up. It is painfully slow on my Zire 71 until you shoot 3/4 of the aliens. Add explosion sounds; currently the only sound is the march of the aliens. Bugs discovered: bases/shields sometimes disappear, sound is sometimes silent, and once the last alien stood in one place, making him pretty easy to hit! Thanks for making your games freeware. Look forward to upgrades.

*** [Oct 14, 2004] by Zachary Bartels
SOOO SLOOOOOOW!!!!! Cool graphics though.