no need for crazy array maniplulation

diff --git a/main.coffee b/main.coffee
index c5b9da3..89bc695 100644 (file)
--- a/main.coffee
+++ b/main.coffee
@@ -449,11 +449,14 @@ blip_selection = ->
                        for t in b.down
                                unsink t
                else
-                       while b.flips > 0 and b.down.length > 0
+                       down_count = b.down.length
+                       while b.flips > 0 and down_count
                                b.flips -= 1
-                               flipper = Math.floor(Math.random() * b.down.length)
+                               flipper = Math.floor(Math.random() * down_count)
                                unsink b.down[flipper]
-                               b.down = [b.down[0...flipper]..., b.down[flipper+1...b.down.length]...]
+                               down_count -= 1
+                               # move the last tile back into range
+                               b.down[flipper] = b.down[down_count]
                if b.force > 0
                        for t in b.up
                                t.new_hp = t.hp + b.force