I want to step back and say this is an incredible achievement. It's both a good, fun, tough-but-fair game as well as a great piece of transformation/expansion content. Extremely well done, and out of nowhere!
Also, I have to say how refreshing it is that it's a complete, finished product; so many expansion games start off strong and then get utterly lost in scope creep, the developers disappearing into the thickets of the back half of their game's mechanics/plot/art and never releasing an ending.
Anyway, for anyone reading this: it definitely deserves your three bucks, and I'd say it's a bargain for the price.
(Oh, if there's one thing I'd like: a proper release for Mac. I can get it working via Heroic, but it's a bit of a pain. This is a Godot project, should be down to checking a box at build time, although I understand that getting proper code signing set up for Mac deployments means you have to pay the Apple tax...)