diff --git a/README.md b/README.md
index 63598a5..306b42c 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,14 @@
 # Marble Machinations
-(working title)
 
 logic mostly like https://git.crispypin.cc/CrispyPin/marble
 
 ## todo
+### meta
+- itch page text
+- engine tests
+### game
 - comments
+- highlight regions with background colours
 - accessibility
   - ui scaling
   - background colour setting
@@ -12,8 +16,8 @@ logic mostly like https://git.crispypin.cc/CrispyPin/marble
   - hotkeys for everything (no mouse needed to play)
   - font selection (possibly a lot of work)
 - more levels
+- footprint and bounding box stats (instead of area)
 - scroll output bytes
-- make direct power (comparator -> machine) work, (needs storing power direction in machine tiles)
 - cut selections, copy to system clipboard
 - timestamps in solutions and blueprints
 - lock tile types for early levels to make it less overwhelming
@@ -21,6 +25,11 @@ logic mostly like https://git.crispypin.cc/CrispyPin/marble
 - option to use 8-bit marbles?
 - blueprint rotation?
 
+## playtesting observations
+- 'loops' introduces too many things (powering, redirection, generating zeroes)
+- players expect buttons to be triggered even when theres something blocking the marble on the other side
+- math tile is not intuitive
+
 ## file hierarchy
 ```
 - assets/