diff --git a/Cargo.toml b/Cargo.toml
index 16227c3..0414973 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "pixsy"
-version = "0.72.5"
+version = "0.72.6"
 description = "convert images to Bitsy rooms"
 authors = ["Max Bradbury <max@tinybird.info>"]
 edition = "2018"
diff --git a/TODO.md b/TODO.md
index 682e0e7..0a59acd 100644
--- a/TODO.md
+++ b/TODO.md
@@ -8,3 +8,4 @@
 * if "create new bitsy game", add new room as room 0
 * actually create room
 * stats for added room (number of tiles)
+* dedupe "palette from custom colours" functionality
diff --git a/src/lib.rs b/src/lib.rs
index 269ce73..4d43ac0 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -242,18 +242,40 @@ pub fn add_room() -> String {
         return "No game data loaded".to_string();
     }
 
+    match &state.palette {
+        SelectedPalette::None => { return "No palette selected".to_string(); },
+        _ => {}
+    };
+
     let mut game = state.game.clone().unwrap();
 
     if state.image.is_none() {
         return "No image loaded".to_string();
     }
 
+    let palette_id = Some(match &state.palette {
+        SelectedPalette::None => bitsy_parser::mock::game_default().palettes[0].id.clone(),
+        SelectedPalette::Existing { id } => id.clone(),
+        SelectedPalette::New { background, foreground } => {
+            game.add_palette(bitsy_parser::Palette {
+                id: "0".to_string(),
+                name: None,
+                colours: vec![
+                    background.clone(),
+                    foreground.clone(),
+                    bitsy_parser::Colour { red: 0, green: 0, blue: 0 }
+                ],
+            })
+        },
+    });
+
     let width   = state.image.as_ref().unwrap().width();
     let height  = state.image.as_ref().unwrap().height();
     let columns = (width  as f64 / SD as f64).floor() as u32;
     let rows    = (height as f64 / SD as f64).floor() as u32;
 
-    let mut tile_index = 1;
+    let mut tile_ids = Vec::new();
+    let mut new_tile_count: u32 = 0;
 
     for column in 0..columns {
         for row in 0..rows {
@@ -271,25 +293,45 @@ pub fn add_room() -> String {
             let tile = Tile {
                 // "0" will get overwritten to a new, safe tile ID
                 id: "0".to_string(),
-                name: tile_name(&state.room_name, &tile_index),
+                name: tile_name(&state.room_name, &new_tile_count),
                 wall: None,
                 animation_frames: vec![Image { pixels }],
                 colour_id: None
             };
 
-            if !game.tiles.contains(&tile) {
-                game.add_tile(tile.clone());
-
-                tile_index += 1;
-            }
+            tile_ids.push(
+                if game.tiles.contains(&tile) {
+                    game.tiles.iter().find(|&t| t == &tile).unwrap().id.clone()
+                } else {
+                    new_tile_count += 1;
+                    game.add_tile(tile.clone())
+                }
+            );
         }
     }
 
+    // todo if player selected "create new game", delete room 0 here
+
+    game.add_room(bitsy_parser::Room {
+        id: "0".to_string(),
+        palette_id,
+        name: None,
+        tiles: tile_ids,
+        items: vec![],
+        exits: vec![],
+        endings: vec![],
+        walls: None
+    });
+
     game.dedupe_tiles();
 
     state.game = Some(game.to_owned());
 
-    "OK".to_string()
+    format!(
+        "Added room \"{}\" with {} new tiles",
+        &state.room_name.as_ref().unwrap_or(&"untitled".to_string()),
+        new_tile_count
+    )
 }
 
 #[wasm_bindgen]