I've found a great flash game. As the title says, It's called "Balloon in a Wasteland". It's about a guy who crashes his hot-air balloon and has to fight his way through countless weird monsters while repairing his balloon. You can buy guns, traps, forts, and turrets for the fort. The guns, forts, and turrets have upgrades too. Sadly, you require sleep or your stamina gets down, but I've always found the time to keep my stamina high.
Post your scores!
My score was 146:52:00 (146 hours), 1,566 enemies killed, and $87,210.00 earned.
Discuss, I guess?
http://hallpass.com/media/balloon-in-a-wasteland.html
