Six-spotted fishing spiders will disrupt the formation of bridges until they're taken care of. T4 challenge might be something left until post-version 1.0 - we'll see how we do!
It's a balance point. Later levels have more environmental infighting but stray ants taking your food wouldn't be something to worry about if they stopped to fight everything along the way.
There's the consideration to this that we're making a strategy game, not a simulation. At some point having animals hide and never or rarely attack just becomes frustrating. Imagine if most creatures were like the harvestman - which is so annoying to fight against we even have the narrator call...
Instances of this are usually caused by insuficient hardware - make sure you're meeting the minimum specs.
Outside of that, the first thing to do is to try updating your graphics drivers (our recent bug reports show that around 70% of crashes are caused by driver issues). It would be a good...
Hi! Glad you're enjoying the game!
We gave it a lot of consideration but we decided a long time ago EotU isn't going to have a multiplayer mode. We'd like to do something multiplayer, but from the ground up - so our next project is very likely to include multiplayer as a key feature.
How recent is this? There hasn't been an update in a few months at this point.
Try switching between screen modes (full screen to windowed) and between resolutions to see if it fixes things.