All of LDW's real-time games can be "sped up" or "time warped" by setting your PDA's system clock forward. You have to be careful doing this, however, because (depending upon the game), you can kill villagers/plants/fish/pets by messing with the system clock. Try small increments of time first (an hour or two), until you get a feel for what happens. In some games, moving the clock backwards can bring disaster.
You should also keep in mind the effect of changing the system clock on your other applications. Some things don't like the clock being messed with, and any files you create during your time warp will have the wrong timestamp.
I never mess with the clock on my "real" PDA - only my test devices, since I don't use them for anything else.