Add a "landing page" as index.php

Update the README to add useful tips and some more information

README.md

@@ -1,9 +1,27 @@
 # JsTypeHax
 
-Wii U browser exploit for system version 5.5.2 and 5.5.3.  
-Requires a valid payload (`"code550.bin"`) in the root dir and the release files from the [wiiuhaxx_common repo](https://github.com/wiiu-env/wiiuhaxx_common/releases) inside a subfolder called `"wiiuhaxx_common"`.  
+Wii U browser exploit for system version 5.5.x (5.5.1 and 5.5.3 has been tested,
+but any 5.5.x should work).  
 
-The environment after getting code execution is **very** fragile. It's recommended to use the [JsTypeHax_payload](https://github.com/wiiu-env/JsTypeHax_payload) to get into a limited, but stable one.
+The exploit may even work on older versions, but this has not been tested yet.
+
+# Usage
+
+Requires a valid payload (`"code550.bin"`) in the root dir and the release files
+from the [wiiuhaxx_common repo](https://github.com/wiiu-env/wiiuhaxx_common/releases)
+inside a subfolder called `"wiiuhaxx_common"`.  
+
+The environment after getting code execution is **very** fragile. It's recommended
+to use the [JsTypeHax_payload](https://github.com/wiiu-env/JsTypeHax_payload) to
+get into a limited, but stable one.
+
+# Useful tips
+
+- **Make sure to run the exploit via an link (like the `index.php`), visiting
+the exploit page (`index-hax.php`) directly may fail.**  
+- If you have any issues, try to reset your browser save data.
+- Don't visit any other pages before doing the exploit (open browser -> open
+  index.php -> click on "HAXX")
 
 # Requirements
 A webserver with php support.

index.php

@@ -0,0 +1,4 @@
+<a style="font-size: 40px;" href="index-hax.php">HAXX</a><br>
+
+It's important to start the exploit by clicking on a link, visting the exploit site directly probably will crash. <br>
+<b> Make sure to have a valid "payload.elf" on your sd card. </b>