This is my unfinished entry for my third Ludum Dare. I couldn't complete it because the scope was too big, and I didn't realise it wasn't fun until it was too late. Still, I feel like I spend too much time on this not to post it, so here it is :)
I'm having the same issue when trying to build a road (and I can't seem to do anything else :x). It looks cool though, I'd like to try it if that gets fixed.
You're not missing out on a lot because of the road crash I'm afraid. I think that somewhere in this concept is a decent game, but it would be too much work for me to have made in 48 hours.
I get the road crash too. Still, looks like you have the foundation for a neat RTS. I'd rather make peace with my homeland, though: my friends and family probably live there.
Exception in thread "LWJGL Application" java.lang.NullPointerException at walnoot.ld28.screens.GameScreen.update(GameScreen.java:234)
Would have liked to see where you go with the base building!