Say hi to the newly arrived content and changes

Say hello to the new content:
- survival mode.
- animal animations
- when a new challenge is introduced, it is high lighted with a yellow circle.
- when you reach the game over-state, a red circle shows you which block was responsible.
- a screen that tells you you finished 3 levels.
- title screen background

And many smaller changes.
If you want a detailed changelog next time, let me know.