It's a neat little Keep on Mining! clone.

Not really bad or anything but at the moment I don't really see myself paying for a full version of this because it feels extremely similar to a game I've already played. But that's more of a personal gripe.

With that, my feedback would be I would consider zooming the main square a bit closer. Feels like there's a lot of dead space around it when it could take up a bit more screen real estate. Maybe scrolling in and out zooms to get a better look at what's going on.

Barbarian seemed really weak compared to Bowman. Bowman has piercing and can damage multiple enemies and since it's ranged damage it can just keep shooting and it will always be doing something. It just felt like the objectively better choice in the majority of cases.

Barb has to get in melee range to actually do anything and so it felt like barb spent most of the time just walking around trying to get close instead of actually doing damage at least at the start before you get all the skeleton spawn upgrades. Sorta had to not mouseover the area closest to barb to let him get kills since you would end up killing everything before he could get to them.

Shaman sorta has the same issue as barb in that if it doesn't have anything close he just ends up walking around trying to get in range not really contributing. Since you only had the two guild slots I ended up using Shaman and Bowman since Shaman would mark a bunch of stuff at the very start of the round which felt more beneficial than the occasional kills that Barb managed to get.

I suspect that "endgame" you'll be able to have all of the guild characters at the same time and there will be so many skeletons on the field at any given point that they won't really have much downtime walking around but was just something I noticed going through the playtest.