Very, very, very promising (and might be a much better experience on mobile) but I think it needs a lot of work before I'd consider shelling money for it. Basic features are just simply missing:
On the x64 Windows version the tutorial comes to a step where the description of the tutorial step falls off the bottom of the screen. There's no way to continue the tutorial.
There's no way to zoom the map except by double-clicking it, and then using an obtuse calculator thing. Resizing the map by typing new X/Y size causes the map markers to be placed in the wrong place. Resizing the map by using the +/- tool doesn't update the X/Y size. Can't use number pad to enter numbers, you have to click the numbers in the very-frustrating-calculator-thing. I would expect that I could use +/- on my keyboard, or the scroll wheel.
Lots of spinboxes that function "upside down" and seem like they were designed for mobile but then never re-purposed for desktop. Clicking the up/down arrows on the spinboxes doesn't work, you have to drag the values up and down, and can't type values in manually.
Pressing "Add" next to Creatures in an Entry does nothing as far as I can tell.
ESC and DEL don't function as expected - ESC should cancel the current action, and DEL should...well...delete!
Lots of flyout menus (double clicking an Entry for example brings up a useless menu that asks if you want to edit it or delete it...).
It's definitely aesthetically pleasing, and I think this has incredible potential...but the UX needs a lot of work, and for a tool that is 90% dealing with the UI, that's disappointing. Please take this as constructive feedback, as I think there is a lot of potential and would really like to see this tool get better.