Before I start so there isn't any confusion. In the app store this game is called X-Construction (paid version) and X-Construction Lite (free version). Also this app requires an Android 2.1 or above.
In this game you build a bridge to get a train across a valley safely without the bridge breaking. The graphics are pretty good for it being a game on a phone. The sounds can be a bit loud if you aren't paying attention. When you play the video for the train to cross the bridge you can hear trains going across a train track which is pretty neat. Also if the bridge fails you will hear screaming from the passengers on the train.
I have to add that I played this game for over 2 hours and never got bored with it, because you have to keep at it to finally pass some of the levels, because you don't know what to except to happen when you hit play to watch the train cross the bridge. Sometimes you fail and sometimes you succeed. Just depends your bridge and how many cars are on the train.
The paid version is $1.35. In the paid version you don't have to worry about ads, you get a free build mode and you also get more levels and materials in future updates.
The downfall is if you get the free version and you decide you want the paid, you have to start all over again, because the two doesn't share a save function.
Rating: 4/5