add game help for BlockChain

res/GAMEHELP/BLOCKCHAIN

@@ -0,0 +1,25 @@
+       Combine same-color blocks
+
+    to progress through color chain
+
+          until they disappear
+
+
+
+ Press Space to exit demo & start game
+
+
+
+                  move
+
+                 J   L
+                   K
+
+                  drop
+
+
+
+R* * * * * * * * * * * * * *restart game
+
+Esc* * * * * * * * * * * * * * * * *quit
+[eof]