diff --git a/TODO.md b/TODO.md
index 0473792..c384c5c 100644
--- a/TODO.md
+++ b/TODO.md
@@ -2,8 +2,9 @@
 
 ## game data structure
 
-more colours? max 10? (0-9)
+more colours? max 10? (0-9) max 16? (0-f)
 colours not in palette can use modulo
+background palette and foreground palette? would be good to make interactive stuff obvious
 
 --
 
@@ -37,6 +38,10 @@ idea:
     * support older graphics adaptors
     * player has some graphical tearing on non-integer window sizes
 
+* show a help splash screen on first boot (with "do not show me this again" checkbox which saves to a local config)
+  * what is peachy?
+  * controls
+
 ### windows
 
 * ~try to compile~