I thought the subway was a great addition to transportation around to world and is wonderfully implemented - the sounds, the animation, all awesome!
Here's how the Subway system works (for people who didn't get in last test, or didn't try it out): You enter the subway station (there's one in Somewhat Sump and Groddle Forest Junction), then to the far right of the station, there is a 'Red Button'. Push it to get one ticket. You are then put on the train, but you have to wait until two others board until it starts moving (there have to be 3 passengers on your train). Once they're on, the train starts moving and lights flash past the window, which stop as you approach the next stop. For a few seconds, have the choice to get off there or not. If not, the train carries on going along to the next station (which at the moment is only 2 stations).
Screenshots:
i.imgur.com/Z1nSG.png
i.imgur.com/0ojiC.png
i.imgur.com/hcrwf.png
i.imgur.com/4cbRN.png
i.imgur.com/2CEhf.png
One slight complaint is the fact that it can only hold one group of people and that others cannot get on your train. I'd be kind of cool to meet other people on the subway train as they come on and off. But, well, I guess it's not very scalable.
Oh, and it's super cheap! 50 currants! :O
UPDATE: Video! Wait, wut? No sound on the Youtube version? :( Hmm, I had to upload to TwitVid instead (so definitely don't share the link):
www.twitvid.com/QWSQX
(Oh, and Beefcake put the pig there ;)