Thanks for trying it out! Right now, there is a game over at the end, when you actually have won the level. Otherwise, your health has probably gone to 0? Though that isn't even easy in the tutorial map. But that part of the mechanic isn't very obvious and one of the top things I want to work on. The other one is bringing the mouse navigation back :)
The current overworld map is really just a quick sketch to show the concept. There's a whole lot of worldbuilding coming up!