diff --git a/src/game.rs b/src/game.rs
index 01a8cae..0ac5943 100644
--- a/src/game.rs
+++ b/src/game.rs
@@ -4,7 +4,7 @@ use crate::{Avatar, Dialogue, Ending, Item, Palette, Room, Sprite, Tile, Variabl
 pub struct Game {
     pub name: String,
     pub version: f64,
-    pub room_format: u8,
+    pub room_format: u8, // this is "0 = non-comma separated, 1 = comma separated" apparently
     pub palettes: Vec<Palette>,
     pub rooms: Vec<Room>,
     pub tiles: Vec<Tile>,