Online multiplayer games are available, as well as a single-player against computer.
How to play: http://wiki.openttd.org/Tutorial
How to add computer opponents: https://wiki.openttd.org/AI_settings
Scroll the map with two fingers, when you are building roads or stations.
Close dialogs by dragging them to the screen edge.
Translate Android version to your language here: https://translator.openttdcoop.org/project/openttd-android-translate
This game is open-source - you can download sources and previous releases from http://sourceforge.net/projects/libsdl-android/files/apk/OpenTTD/
Visit our forum at https://www.tt-forums.net/