diff --git a/readme.md b/readme.md
index 2148fe7..9233d91 100644
--- a/readme.md
+++ b/readme.md
@@ -46,7 +46,8 @@ if (src.match(/^(file|https)?:\/\/|^\/\//)) {
 
 ## to do
 
-* make it clear that the user can paste in their own game data
+* add 'clear'/'upload' buttons for game data
+* select all on clicking game data entry field
 * allow user to save output as image, or tweet it :) 
     * *user can currently right-click -> Save As but the 128x128 size is not great*
 * re-style the damn thing
@@ -55,11 +56,12 @@ if (src.match(/^(file|https)?:\/\/|^\/\//)) {
 * profile script performance and optimise where most needed
 * make brightness slider trigger redraw every so often while being dragged, instead of waiting until drag stop
 * add up/down arrows to the brightness slider for incremental tweaks
+* add 'all-white' tile by default in case the game data doesn't have it?
 
 ## could do
 
-* add some more palettes?
-* add some alternate default tiles? something more useful e.g. dithered gradients?
+* add some more palettes
+* add some alternate default tiles - something more useful e.g. dithered tiles, gradients
 * add dithering options
 * add camera support so users can take a pic instead of uploading an image
 * add a 'smoothing' stage to remove errant pixels
@@ -72,4 +74,5 @@ if (src.match(/^(file|https)?:\/\/|^\/\//)) {
 * make new tiles out of fragments of existing tiles instead of directly copying from bitmap
 * allow user to zoom out so the image is letterboxed/windowboxed/etc.
 * break up rendering into separate preview and output modes (would be good to have a throttled preview for brightness slider adjustments and then a debounced tile render)
-* add 'invert' function?
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+* add 'invert' function
+* allow for image colour hack
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