I decided to test it out... As for the first scenario, I'd give it a three out of five, but I think it will get better as you develop it further (I really hope so).
1) The map is a bit empty, and the scenario isn't very complex; it's just a simple run-through.
2) The second hero, Frida-Iris, is actually quite powerful. I think you need to make it a serious challenge to reach her at the start. I looked at her stats and spells and realized that she can handle everything herself (three battles).
3) There are two mentors on the map, but the fact that you can't summon ships negates the advantage of having two heroes. Perhaps the idea was that you either play as an Orc or a Knight.
4) And the excessive army that joins the Orc, along with the various upgrades, is probably meant to make the player suffer a bit, right? But it's offset by the forts on the hill.
5) For such an army, you could even increase the difficulty of the final boss a bit to make it more interesting.
6) This is just a minor complaint: the final battle could be designed so that it can't be completed using auto-combat. In other words, even if auto-combat is enabled, you still have to fight manually. I'll attach a couple of screenshots and a replay of the final battle.
Overall, it's a good way to kill some time and relax. By the way, the optional quest in the hut doesn't work; it says that there's no one there.