So I just skipped the tutorial and continued to play the rest of the campaign. The 2nd actual mission called "First Siege" ended with a victory after my catapults had just killed the very first enemy (ballista) tower. All other enemy units were still alive.
It's a pretty neat game aside from all the scripted campaign bugs though. :)
Thank you for testing! I'm sorry, the campaign doesn't really work now. I had to mention this in the description. I was concentrated on multiplayer for half a year, after tons of refactoring the campaign has degraded and currently all the scripted levels don't work.
I recommend you to play custom levels from "Community" and standard levels from "New game". Also you can try multiplayer in "Community" -> "PvP" tab. Right at this moment I'm fixing tutorial and campaign. I have a list of bugfixing tasks that I'm going to finish in couple weeks.
Sorry again, will do my best to fix all the problems as soon as I can.
