Locomotion update

Hello again !

At first, I didn't include walking in the game since I personally still have motion sickness. But it is now available in the game for the more experienced players.

So, the patch notes are:

• Teleport or smooth locomotion support.
• The difficulty of the game increases faster, the monsters are harder to kill.
• There is a cheat to open all the worlds: from the menu, press both grips and both triggers during 5 seconds and it will open all the portals. Once you  chose your portal, the game will save your progression from there...

Have fun !