diff --git a/readme.md b/readme.md
index f5bcbf8..e7190a7 100644
--- a/readme.md
+++ b/readme.md
@@ -60,6 +60,9 @@ if (src.match(/^(file|https)?:\/\/|^\/\//)) {
 * handle arbitrary animation frames (editor only supports 2 frames, but game data has no upper limit)
 * list how many new tiles are being created
 * combine preview and output
+* give warning on duplicate room names?
+* loading spinner on rendering?
+* make brightness slider exponential
 
 ## could do