Update link in Readme

Author: nifey

README.md

@@ -5,7 +5,7 @@
   <strong>My entry for JS13Kgames 2020</strong>
 
   <h3>
-    <a href="#">Play Online</a>
+    <a href="http://js13kgames.com/entries/inter-planetary-internet">Play Online</a>
   </h3>
 
   <sub>Built with Rust and Wasm 🦀🕸</sub>