Problems with a second game...

hey everyone,
i almost finished my elf game (with all the tips you guys gave me :wink: ) and im starting work on a simulation…its a new idea too…a hot air balloon simulation.
my problems are:
balloons move by the wind…so i need a realistic way of making the balloon move randomly…like the wind…of course :smiley:
i need a fuel gauge that will run out after time, forcing landing.
and i don’t really know what i should do with the landscape, i thought like flight sim 2000 (basic and flat) cos detailed would slow it down.
also…inflation of the balloon is important…but i imagine that would need a detailed animation.
thanx all! 8)
http://www.geocities.com/reprecreator