Lot's of small changes to Magirune 2

A lot of small updates were done to the game after receiving a lot of feedback. Really appreciate all the good comments. The full game is still under development and I hope you will all love it.

• Pulse the player when the keyboard hasn't been pressed.
• Added a small path to the mayor house.
• Fire monsters don't make fire when the player is strong.
• A skull appear in the room name when the player die in hard mode.
• A new NPC appear at the end of the demo instead of a questions mark.
• When dying from poison, the player would move in weird directions.
• Change the behavior of the ESC keyboard button.
• Added a small tutorial in the first house.