Here is the 120.2 version of simutrans. It has many new features for scripting (including scriptable ai, so everybody can make now his own AI without compiling), as well as many extensions for artists:
- groundobj with slopes (rocky shores)
- transparent graphics (better shadows and smokes, antialiasing)
- factory animations and sounds
If you prefer to keep with the 120.1.3 build, this can be selected from the 'Beta' options.