Add a popup with description of game objects

[Oleg-designer]

Create a popup with game objects description. The popup should be showed when user sees a gmae object on the play ground in first time.

Objects types

• Red caution - This object will destroy the snake (try to avoid collision.)
• Blue caution - This object will repel the snake you can use this object for maneuvers.
• Green caution - This object will remove all visible obstacles, try to collect such objects.