I like the idea, the pixel art & map design are pretty.
I found 2 elements a bit frustrating : The lack of feedback when a hiker is selected (you think you have selected a hiker but it's not case), and sometimes hikers seems to spawn too far from its target so it means it's random gameover anyway ?
Maybe if hikers walked way faster on roads so you can micromanage them ? It would also increase the skillcap of the game while being less frustrating ? I don't know.