diff --git a/levels/00_zeroes.json b/levels/00_zeroes.json
deleted file mode 100644
index 2094e3b..0000000
--- a/levels/00_zeroes.json
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-	"id": "00_zeroes",
-	"name": "Zeroes",
-	"description": "learn how to output data\nthis is a multi-line test",
-	"init_board": null,
-	"inputs": [],
-	"outputs": [0, 0, 0, 0, 0, 0, 0, 0]
-}
\ No newline at end of file
diff --git a/levels/01_cat.json b/levels/01_cat.json
index ba72b4f..0318e87 100644
--- a/levels/01_cat.json
+++ b/levels/01_cat.json
@@ -1,7 +1,8 @@
 {
-	"id": "01_cat",
+	"id": "intro_copy_input",
+	"sort_order": 12,
 	"name": "Copy Cat",
-	"description": "learn how to meow",
+	"description": "read input and output the same thing",
 	"init_board": null,
 	"inputs": [72, 101, 108, 108, 111, 44, 32, 119, 111, 114, 108, 103, 33],
 	"outputs": [72, 101, 108, 108, 111, 44, 32, 119, 111, 114, 108, 103, 33]
diff --git a/levels/01_loop.json b/levels/01_loop.json
new file mode 100644
index 0000000..960b5c8
--- /dev/null
+++ b/levels/01_loop.json
@@ -0,0 +1,9 @@
+{
+	"id": "intro_loop",
+	"sort_order": 11,
+	"name": "Loop",
+	"description": "repeated output",
+	"init_board": "o o\n   \n*P \n   \n   \n   ",
+	"inputs": [],
+	"outputs": [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+}
\ No newline at end of file
diff --git a/levels/01_zero.json b/levels/01_zero.json
new file mode 100644
index 0000000..7de9959
--- /dev/null
+++ b/levels/01_zero.json
@@ -0,0 +1,9 @@
+{
+	"id": "intro_output",
+	"sort_order": 10,
+	"name": "Zero",
+	"description": "learn how to output data",
+	"init_board": "o o\n   \n*P \n   \n   \n   ",
+	"inputs": [],
+	"outputs": [0]
+}
\ No newline at end of file
diff --git a/src/level.rs b/src/level.rs
index 912a65c..592195c 100644
--- a/src/level.rs
+++ b/src/level.rs
@@ -3,6 +3,7 @@ use serde::Deserialize;
 #[derive(Debug, Clone, Deserialize)]
 pub struct Level {
 	id: String,
+	sort_order: i32,
 	name: String,
 	description: String,
 	init_board: Option<String>,
@@ -15,6 +16,10 @@ impl Level {
 		&self.id
 	}
 
+	pub fn sort_order(&self) -> i32 {
+		self.sort_order
+	}
+
 	pub fn name(&self) -> &str {
 		&self.name
 	}
diff --git a/src/main.rs b/src/main.rs
index 35159da..74e6ad8 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -236,7 +236,7 @@ fn get_levels() -> Vec<Level> {
 			levels.push(level);
 		}
 	}
-	levels.sort_by(|a, b| a.id().cmp(b.id()));
+	levels.sort_by(|a, b| a.sort_order().cmp(&b.sort_order()));
 	levels
 }