Here's a video I uploaded the other day to my YouTube channel that shows a timelapse of an hour of gameplay in v0.2 (the current one with some of the things in the video fixed. (See changelog for v0.2.1)
Regarding responsiveness... there is a thing currently with object collision and objects being 2.5D. The collision for objects is the field they are on, but the sprite often reaches out at the top. So if you click the top, your click goes through to the field behind.
On that note: Yes, the current public version is more buggy, but if your experience is not even near the beginning of this video, there's prolly something going on that I'm not aware of. It would surprise me if a bug could cause such a large discrepancy and would go unnoticed. (Then again, I managed to go through a whole update cycle without noticing that a single NPC sometimes gets stuck in an unresponsive state)
Regarding tutorial in the full game:
I do plan to add campaigns eventually, that's more of an afterthought, though, similar to the level editor. Most of the game should be self-explanatory. I guess some features would be nice to hint at, like long presses for the context menu. I could make a post detailing it, if you feel like the video and trailer video I added are insufficient.
Yes, in version 0.2 (bronze age update), when you reach the bronze age, you will get access to military materials that allow you to build watchtowers to increase playable land.
Hope that helped~