diff --git a/TODO.md b/TODO.md
index dbdf2ab..41ce840 100644
--- a/TODO.md
+++ b/TODO.md
@@ -138,3 +138,8 @@ Mars themes in all generic segment generators.
 - Makefile web-serve: removed `2>/dev/null` so real errors are visible.
 - `s_mars_depth` and `s_station_depth` reset when game loops back to beginning.
 - Added `gen_bg_decoration()` call to Mars Base generator.
+
+## Editor: level select should also load into game
+In showEditor mode, the Open level-select dialog currently only loads the
+selected level into the editor. It should also load the level into the game
+(MODE_PLAY) so test-playing reflects the newly opened file.