This game also works in windows if you have python 2.7 and pygame installed. The game is really difficult, I couldn't get past the bit where your core shifts into four places. I'm glad you have in there all the basics for a game. Amazing you completed a tower defense in 48 hours, well done.

Thanks Perry particularly for giving it a go even though it's not packaged up for window yet. My last couple of games were a bit easy so I thought I'd make it a bit trickier! (It is worth completing though)

Really nice design, and fits the theme well. Very hard though!

Looks interesting, too bad I'm on Windows... I may try it with Perry solution if I take the time

Great job! Simple, but fun and hard!

Nice game! :)

Minimalistic and hard. I alwys died shotly after the position shift.

Nice idea, the music is a bit repetitive and the game crashed rather quickly:
Traceback (most recent call last):
File "main.py", line 382, in <module>
main()
File "main.py", line 335, in main
baddie.tick(paths,grid)
File "main.py", line 165, in tick
self.choose_next_grid(paths, grid)
File "main.py", line 148, in choose_next_grid
options = [ option for option in options if option in paths ]
TypeError: argument of type 'bool' is not iterable

Under Arch Linux you have to use python2.

Hmm, I understand the issue, somehow an unreachable square has been created, I can't work out how :-( hmmmm

No windows/web port :(

Pretty tough! I think some indication of how many towers were left would be helpful. It looks like you prevent completely enclosing a tower - seems like it would've been tricky to implement, nice.

In Mint, the pygame package was called "python-pygame".

It plays pretty well, but it's really hard. Tower defense usually gives you a little breathing room to build your defenses between rounds. Now I know why. =) Moving and replicating the base feels a little unfair, especially when it goes to all 4 sides of the screen and the enemies completely neglect your previously-fortified bases in favor of the new positions.

Have you looked at PyInstaller (http://www.pyinstaller.org/) or cx_Freeze (http://cx-freeze.sourceforge.net/) for packaging the game cross-platform? I haven't used either, but I know I've played packaged pygame games before.

Great concept! Very hard but the extra difficulty forced me to experiment and create new strategies, revealing the depth of the game. Works great with the theme as a minimization of RTS/tower defense.

Fun figuring out the mechanics but pretty easy once I got the hang of it. Just build a spiral around the center, then a snaking hallway leading to the left base, then 3 blocks around each of the other 3 bases. You have to know when the bases are coming and start building before they show up, though.

This game was great! It made me laugh out loud quite literally. First, I didn't know how to play. Then I realized it was a tower defence game. Then you moved my damn base! Then just when I thought I had you, suddenly I had two bases? And then four!!!

┻━┻ ︵ヽ(`Д´)ﾉ︵ ┻━┻

Honestly though, really great game. Hidden genre, hidden controls, minimal visuals, brutally difficult.

Mind a port for windows? I don't use Python/Pygame at all and I really don't feel like installing them.

Finally I managed to run right version of pygame.
Nice tower defense by the way.

Cheers for all the comments, I will learn how to do windows packaging in time for the next LD, I promise!

Linux and Mac Only? Ballsy Choice :P