Thanks for playing, glad you liked it!
The druid has an upgrade that turns him into a tree if he stays in place for a turn. It makes him a lot stronger but it can be punishing if you do it accidentally so there is a way to revert it if you use his secondary skill.
I did recently release the game on steam so I'm not sure if I'll be posting any more demos here. Ideally I'd want to show off my new project next time. The last demo in DD 57 was focused on the campaign and I think there are some VODs there if you want to take a look.