diff --git a/Readme.md b/Readme.md
index 681219b..bf5f205 100644
--- a/Readme.md
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@@ -60,6 +60,7 @@ There's also an easy mode for kids (slower ball) and a color-blind mode (no colo
 
 ## Engine ideas
 
+- particles when bouncing on sides / top
 - show total score on end screen (score added to total) 
 - show stats on end screen compared to other runs
 - handle back bouton in menu