Ideas of New Theme for Bineromania?

hi guys

I am looking for ideas for new themes for my game Bineromania
Download link here

The ones currently available are:
- default (zeros and ones)
- positive and negative
- boys and girls
- Tic-Tac-Toe (circles and crosses)
- Money (dollars and euros)

Here are some screen captures to give you an idea



I thought about
- cats and dogs
- sunny and raining
- Love and Hate
...etc

But i would prefer to have your feedbacks and ideas

Thanks in advance
DARGIL