We wish we did not have to exclude countries from global competitions. Unfortunately, it is legally complicated to run prize-based competitions in some countries due to local contest or sponsor regulations. By no means is this a statement as to whether international developers are valued or not. They are! It's just a matter of complying with US and local laws, as well as the sponsoring organizations policies.
You are still certainly welcome to create an app using ObjectRocket and post it to your portfolio, but unfortunately you will not be eligible to win a prize in this competition.