To have ships of different sizes that have to pass under the bridge would have loads of positive effects:
-it's one of the most obvious expansions for a game about bridges.
-it would be a nice way to make some levels more difficult (just preset one of , let's say, 3 different ships that have to pass under the bridge before you can start the train when you construct your level)
-it would make for more spectacular crashes ;-)
-for viewing pleasure, you'd also have to implement complete rotation into the engine (which I would ask for anyway :-)
-it's one of the most obvious expansions for a game about bridges.
-it would be a nice way to make some levels more difficult (just preset one of , let's say, 3 different ships that have to pass under the bridge before you can start the train when you construct your level)
-it would make for more spectacular crashes ;-)
-for viewing pleasure, you'd also have to implement complete rotation into the engine (which I would ask for anyway :-)