So I'm busy working on yet another map, and playtesting it.
Consistently, it crashed at about 3 and a half minutes in. Well, not crashed, but the screen just froze up completely whilke the game in the background half froze. Timers kept going and popping message sounds, but the screen and game sound effects were stuck at my beams hitting a spore.
After pulling out my last remaining hairs in confusion, I had the bright idea of zooming way out in the editor.
Lo and behold. Apparently when my cat had jumped on my hand earlier, it had managed to grab a spore tower and drag it from it's designated position a mile south, outside of the map border.
So if you want to witness odd freezings, place a spore tower outside of the map border. Game will glitch as soon as it starts firing.
Sneak preview
Spoiler
(http://i303.photobucket.com/albums/nn127/martinuzzz/spirepreview_zps3wkiimvy.png) (http://s303.photobucket.com/user/martinuzzz/media/spirepreview_zps3wkiimvy.png.html)
Clockwork spores inbound