Added Obstacles in Gotham Background

[hkveeranki]

In reference #91
Removed the Old Clones
Added two obstacles similar to the ones used

[niccokunzmann]

Now, one can not just do nothing and complete the level. This closes #91.

I want to make sure you know we can only license this game under a free license if all work is free (i.e. created by contributors who agree that they would like to license it under a free license). Thus, I hope you know I trust you, when you say yes to the following question:
Did you create these yellow bats by yourself?

(They are so detailed and beautiful to me that I feel amazed.)

[hkveeranki]

Yes I created them my self by importing the image from openclip art library I hope that comes with a free licence.

Now, one can not just do nothing and complete the level.

I did not get what you meant by that

[niccokunzmann]

I did not get what you meant by that

I mean that the level can not be completed by just starting it and watching without interaction. That was my wish.