Version 2.0. New obstacle, bombs

Make some changes on the code and added a few things. 

• Changed the color on the TitleScreen to match the color of the Knight's sprite
• Changed the speed movement of the orc. Now it moves faster to make it looks like it's trying to tackle the knight
• Added priority to the orc's sprites to avoid the sprite going under the obstacle sprites
• Added some code to make the orcs avoid the pits
• Added a new obstacle. The bombs. I'm working on a explosion animation for when the player collide with the bomb.

The old version still available for download. Please let me know which version you prefer