1: got to stage 2, finished buying assault rifles quest. Then encountered a bug and lost my progress and didn't want to restart.
2: nothing that fully stops things, but the game has a big issue in Vivaldi. Whether or not I'm in full screen, spamming right click would sometimes go to the previous page. I think right clicking opens the standard right click menu, except it's invisible. It's is still clickable and includes "go back".
3: Nothing is showing how many units you're allowed to choose to deploy. It's also a little hard to see which unit which health total belongs to (so you can move low health units to the back)
Placing buildings is a little weird, feels like you're going to be defending them or something, and then it doesn't seem like their position matters at all.
Small other bug in Vivaldi and Firefox: The recruitment menu (and maybe other menus) doesn't open in full screen.
5: I don't get what the point of waiting for things to construct is, since there's no in-game time pressure. I hate when games want me to be thinking about timers I have running while I'm not playing them. But in particular, this game has timers that are like a minute. And you just end up staring at them or tabbing back and forth. If you're doing timers like this, I think they should say how long they are + be either less than 10 seconds or more than 5 minutes.