Update index.html

Author: ianmcd34

index.html

@@ -42,6 +42,7 @@ <h4 id='date'></h4>
     <a href="./AlgebraTrainer/index.html" >Algebra Trainer.<br></a>
     <a href="./MAZE/indexConnectedMaze.html" >Mazes.<br></a>
     <a href="./ADDTO10/index10Game.html" >Add to 10 Game.<br></a>
+    <a href="./ADDTO10/index9Game.html" >Add to 9 Game.<br></a>
     <a href="./PyScript/index_special.html" >Length Compression due to Lorentz Transform at Near Light Speeds<br></a>
     <a href="./chaostheory/index_kepler.html" >Create an Orbit for a Planet<br></a>
     <a href="./chaostheory/index_randomfractal.html" >Create a randomly generated Fractal Island<br></a>