diff --git a/TODO.taskpaper b/TODO.taskpaper
--- a/TODO.taskpaper
+++ b/TODO.taskpaper
@@ -186,14 +186,15 @@
 			Drawing each tile individually is very silly when it's just a (big) square anyway.
 			For edges: Using a dictionary with counts doesn't work either. (~5 fps) Nor using sets.
 			Instead need to do the fill and edge-drawing as large regions.
-		- Draw slows down after merely leaving it running
+		- Draw slows down after merely leaving it running @done(2022-11-14)
+		    Debug issue; could be faster but basically solved
 	Structural improvements:
 		- Button to clear/thin debug buffers?
 			Take every nth to reduce counters to past 100 measurements
 		- Disable some timing code in release mode?
 			Needs some way to enable it.
 		- Avoid redrawing tiles every time?
-			Draw tiles once
+			Draw tiles once into buffer
 	Instrumentation:
 		- Time individual sections of update loop @done(2022-05-16)
 		- Time simulation @done(2022-05-16)
@@ -254,6 +255,8 @@
 			- Create preemption/priority system
 			Have to decide whether to have two levels: normal/preempting or a series of priorities
 		- Expired areas can't be reused. @done(2021-08-07)
+		- Trees seem to spawn in lines.
+		   Is it only spawning neighbor trees in one direction?
 	Dialog:
 		- Dialogs don't appear after
 	Crashes/Stability: