Fixing bug and readjustment

Fixing bug & other

Online game :
- I switch the button 'escape' to 'p' to pause the game, with the fullscreen, he could be very annoying
- No more custom cursor because he was pointing left / bot for a reason I don't know
- The health bar of the boss was twisted

Setup game and online game :
- The collision of Liam's head hitting a little further
- Blue slime was constantly jumping, now he will idle after jumping a certain time

Readjustment

- Blue slime has his range  and his damage slightly reduce, he has more health
- The bird, green slime and red slime has their damage increase
- Add another heal room
- The heal has increase in the heal room
- Slightly decrease Liam's head speed when he chase the player
- The laser of Liam's head has a bigger angle