Thanks for the feedback!
I think I will make the final version of the tutorial an introductory level the player has to complete (or at least start and skip) to get to the rest of the game, I noticed that the current "slideshow" how-to-play is inadequate, especially for players with little experience with strategy games
As for what's next, the next version will mostly focus on on QoL stuff, like moving all on-map buttons to the UI, and also a boss for level one. After that I think I'll add more levels but I've not decided yet