gets harder as you play

diff --git a/main.coffee b/main.coffee
index b44afb6..e67a3e3 100644 (file)
--- a/main.coffee
+++ b/main.coffee
@@ -313,7 +313,7 @@ save_game = ->
 
 # remove the selected tiles from the board, create new tiles, and slide everything into place
 blip_selection = ->
-       difficulty = 7 # higher numbers are easier
+       difficulty = 11 - Math.log(100 + score) # higher numbers are easier
        unsink = difficulty * score_for selected_word() # how much tile restoration we have left to do
        faders = selected.num_sort()
        selected = []