diff --git a/src/activities/mod.rs b/src/activities/mod.rs
index 5d0b11f..34a90d7 100644
--- a/src/activities/mod.rs
+++ b/src/activities/mod.rs
@@ -1,8 +1,9 @@
 pub mod house;
 pub mod overworld;
 
-#[derive(Debug)]
+#[derive(Debug, Default)]
 pub enum Activity {
+	#[default]
 	House,
 	Overworld
 }
diff --git a/src/activities/overworld.rs b/src/activities/overworld.rs
index 2200ed6..ea12f22 100644
--- a/src/activities/overworld.rs
+++ b/src/activities/overworld.rs
@@ -1,5 +1,7 @@
 use comfy::*;
 
+pub mod worldgen;
+
 pub fn draw(_state: &crate::State, _engine: &comfy::EngineContext) {
 	draw_circle(vec2(0.0, 0.0), 0.5, GREEN, 0);
 }
diff --git a/src/activities/overworld/worldgen.rs b/src/activities/overworld/worldgen.rs
new file mode 100644
index 0000000..2a84e41
--- /dev/null
+++ b/src/activities/overworld/worldgen.rs
@@ -0,0 +1,9 @@
+
+#[derive(Debug)]
+pub struct Overworld;
+
+impl Default for Overworld {
+	fn default() -> Self {
+		Self
+	}
+}
diff --git a/src/main.rs b/src/main.rs
index 4992bdf..a310d1e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,22 +1,15 @@
 mod activities;
 mod game;
 
-use activities::Activity;
+use activities::{overworld::worldgen::Overworld, Activity};
 use comfy::*;
 
 const GAME_NAME: &str = "Powercreep";
 
-#[derive(Debug)]
+#[derive(Debug, Default)]
 struct State {
-	activity: Activity
-}
-
-impl Default for State {
-	fn default() -> Self {
-		Self {
-			activity: Activity::House
-		}
-	}
+	activity: Activity,
+	overworld: Overworld,
 }
 
 impl GameLoop for State {