Actually, if you hover over a secret object, the cursor icon changes. And here's another hint. Some objects have their own texture underneath. Which is impossible to hide with other textures.
In total, on this map, I'm testing 4 things:
1) Secrets. I only know their location thanks to the map I drew while creating the map. Otherwise, I would definitely forget where they are.
2) Well-assembled units (with automatic battles disabled), which won't be easy to defeat.
3) Graphical effects.
4) The very idea of variability, where the player has a choice. And depending on the choice, they get something specific.
And if it's not too much trouble, could you give ratings for each point?
Auto-translated