You've got something going here, as it is it feels like a demo of a great game. Short, but still awesome.
1. Make it longer. No brainer here, just about everyone in the comments seems to be asking for this one.
2. Allow the player to launch objects at larger angles. If you could flick an object so that it curves around the earth before gravity pulls it to the ground on the other side you could get things rolling around more, that would be really fun to mess around with.
3. Make the earth larger. If the earth were larger it would feel more rewarding to send an object careening around on it's surface. Every throw would be a lot more unique instead of covering the same ground and hitting the same things you did last time because of the earth's size.
4. To make up for the earth size adjustment, try making the objects get progressively larger. Starting with an object barely large enough to take out a city, and ending with something truly massive.
Anyway, just some ideas I came up with. Obviously there are a few glitches here and there, but it's still very a creative game and I really enjoyed it.
This was great, but....
It took me 20 seconds to beat the game and get a great score. Step two destroy the Universe? C'mon try everyone will love it.
So far one of the few best games I've played. Just a little to short maybe a longer version is in progress?? But still 10/10
It's an okay game, but it needs to be longer. There are also still quite a few physics bugs to work out. Just as the second level started my first time thru half the objects went wonky and destroyed themselves. Perhaps add a line to show flight path?
Very fun just wish it was longer.