I tried the new version of PTK, which has been an effort to get started, as new libs always are. But now I have a black screen you can hit ESC to exit, and a dancing invader on it:
The game idea is simple but unique: It's a Tower Defense game - you place defenses with limited money and hope it's enough to hold off the invading horde. The twist is that it's Space Invaders - you place your 'towers' on the ground at the bottom, and the invaders invade down in the typical pattern we all know and love. There are 3 towers planned: Blaster (the standard Space Invaders ship, which doesn't move), Missile Commander (a missile launcher from the game Missile Command, fires off missiles that explode a circle), and Cryolaser Tank (based on an obscure game called Laser Blast, I think, for the Atari 2600 - a tank that fires a beam which hurts and freezes all invaders in its path). I'd like to also add a Moon Patrol tank, but that's probably too much for 24hrs (as if the rest isn't). You place these things (oh, and Mines to mine moon minerals for cash), and upgrade them. Simple as that!