I had this bitcoin game idea back in 2012 and it took me 4 years to finally decide to develop it.

http://www.bombercoin.com

The game has a simple rule:

1. Buy the bomb for 0.01 BTC
you buy the bomb by sending 0.01 BTC to the specified address and with that you start to own the bomb.

2. Hodl on the bomb for 4 hours
After the transaction is confirmed the bomb timer is restarted to 4 hours.

3. Get the award
if you manage to hold it for 4 hours without anyone else buying it from you, you receive buy in amounts from anyone else that failed holding it.

http://imgur.com/a/IvfdY

If you have any further suggestions to the game I would love to hear them or if you have any concerns I did not address.
Thank you.