diff --git a/README.md b/README.md
index 05721f2..d7327ac 100644
--- a/README.md
+++ b/README.md
@@ -29,12 +29,12 @@ a library for parsing Bitsy game data.
 * variable from
 * variable to
 * room from
+* room to
 
 ## todo
 
 ### functions
 
-* room to
 * game from
 * game to
 
diff --git a/src/main.rs b/src/main.rs
index 95b7092..b20e970 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -30,12 +30,24 @@ struct Tile {
     animation_frames: Vec<Image>,
 }
 
-#[derive(Debug, Eq, PartialEq, Hash)]
+#[derive(Debug, Eq, PartialEq)]
 struct Position {
     x: u8,
     y: u8,
 }
 
+#[derive(Debug, Eq, PartialEq)]
+struct Instance {
+    position: Position,
+    id: String, // item / ending id
+}
+
+#[derive(Debug, Eq, PartialEq)]
+struct ExitInstance {
+    position: Position,
+    exit: Exit,
+}
+
 #[derive(Debug, Eq, PartialEq)]
 struct Dialogue {
     id: String,
@@ -88,9 +100,9 @@ struct Room {
     palette: String, // id
     name: Option<String>,
     tiles: Vec<String>, // tile ids
-    items: HashMap<Position, String>, // item id
-    exits: HashMap<Position, Exit>,
-    endings: HashMap<Position, String>, // ending id
+    items: Vec<Instance>,
+    exits: Vec<ExitInstance>,
+    endings: Vec<Instance>,
 }
 
 #[derive(Debug, Eq, PartialEq)]
@@ -189,24 +201,6 @@ fn test_item() -> Item {
 }
 
 fn test_room() -> Room {
-    // todo can I instantiate these inline?
-    let mut items = HashMap::new();
-    let mut exits = HashMap::new();
-    let mut endings = HashMap::new();
-
-    items.insert(Position { x: 11, y: 5}, "d".to_string());
-    items.insert(Position { x: 8,  y: 3}, "e".to_string());
-    items.insert(Position { x: 1,  y: 0}, "5".to_string());
-    items.insert(Position { x: 2,  y: 1}, "6".to_string());
-    items.insert(Position { x: 3,  y: 2}, "6".to_string());
-
-    exits.insert(
-        Position { x: 3, y: 3},
-        Exit { room: "3".to_string(), position: Position { x: 10, y: 6}}
-    );
-
-    endings.insert(Position { x: 8, y: 7 }, "undefined".to_string());
-
     Room {
         id: "a".to_string(),
         palette: "9".to_string(),
@@ -229,9 +223,22 @@ fn test_room() -> Room {
             "0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),
             "0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string(),"0".to_string()
         ],
-        items,
-        exits,
-        endings
+        items: vec![
+            Instance {position: Position { x: 11, y: 5}, id: "d".to_string()},
+            Instance {position: Position { x: 8,  y: 3}, id: "e".to_string()},
+            Instance {position: Position { x: 1,  y: 0}, id: "5".to_string()},
+            Instance {position: Position { x: 2,  y: 1}, id: "6".to_string()},
+            Instance {position: Position { x: 3,  y: 2}, id: "6".to_string()},
+        ],
+        exits: vec![
+            ExitInstance {
+                position: Position { x: 3, y: 3},
+                exit: Exit { room: "3".to_string(), position: Position { x: 10, y: 6}}
+            },
+        ],
+        endings: vec![
+            Instance{position: Position { x: 8, y: 7 }, id: "undefined".to_string()},
+        ],
     }
 }
 
@@ -760,9 +767,9 @@ fn room_from_string(string: String) -> Room {
     let id = lines[0].replace("ROOM ", "");
     let mut name = None;
     let mut palette = "0".to_string();
-    let mut items: HashMap<Position, String> = HashMap::new();
-    let mut exits: HashMap<Position, Exit> = HashMap::new();
-    let mut endings: HashMap<Position, String> = HashMap::new();
+    let mut items: Vec<Instance> = Vec::new();
+    let mut exits: Vec<ExitInstance> = Vec::new();
+    let mut endings: Vec<Instance> = Vec::new();
 
     loop {
         let last_line = lines.pop().unwrap();
@@ -778,14 +785,14 @@ fn room_from_string(string: String) -> Room {
             let position = item_position[1];
             let position = position_from_string(position.to_string());
 
-            items.insert(position, item_id.to_string());
+            items.push(Instance { position, id: item_id.to_string() });
         } else if last_line.starts_with("EXT") {
             let last_line = last_line.replace("EXT ", "");
             let parts: Vec<&str> = last_line.split(' ').collect();
             let position = position_from_string(parts[0].to_string());
             let exit = exit_from_string(format!("{} {}", parts[1], parts[2]));
 
-            exits.insert(position, exit);
+            exits.push(ExitInstance { position, exit });
         } else if last_line.starts_with("END") {
             let last_line = last_line.replace("END ", "");
             let ending_position: Vec<&str>  = last_line.split(' ').collect();
@@ -793,7 +800,7 @@ fn room_from_string(string: String) -> Room {
             let position = ending_position[1].to_string();
             let position = position_from_string(position);
 
-            endings.insert(position, ending);
+            endings.push(Instance { position, id: ending });
         } else {
             lines.push(last_line); break;
         }
@@ -838,18 +845,26 @@ fn room_to_string(room: Room) -> String {
     }
     tiles.pop(); // remove trailing newline
 
-    for (position, item) in room.items {
-        items.push_str(&format!("\nITM {} {}", item, position_to_string(position)));
-    }
-
-    for (position, exit) in room.exits {
-        exits.push_str(
-            &format!("\nEXT {} {}", position_to_string(position), exit_to_string(exit))
+    for instance in room.items {
+        items.push_str(
+            &format!("\nITM {} {}", instance.id, position_to_string(instance.position))
         );
     }
 
-    for (position, ending) in room.endings {
-        endings.push_str(&format!("\nEND {} {}", ending, position_to_string(position)));
+    for instance in room.exits {
+        exits.push_str(
+            &format!(
+                "\nEXT {} {}",
+                position_to_string(instance.position),
+                exit_to_string(instance.exit)
+            )
+        );
+    }
+
+    for instance in room.endings {
+        endings.push_str(
+            &format!("\nEND {} {}", instance.id, position_to_string(instance.position))
+        );
     }
 
     format!(
@@ -866,7 +881,7 @@ fn room_to_string(room: Room) -> String {
 
 #[test]
 fn test_room_to_string() {
-    assert_eq!( room_to_string(test_room()), test_room_string());
+    assert_eq!(room_to_string(test_room()), test_room_string());
 }
 
 // fn game_from_string(game: String ) -> Game {