If you haven’t already noticed or downloaded the free app of the day from the Amazon.com App store, what are you waiting for? X Construction, a game where a fully loaded train needs to make his way around and you’ve got to help by building bridges to support it. This is a physics based game that some of you may just get addicted to. Take a look at the video below of the paid version examples.

If you download this game today from the Amazon app store you will get it for free. When the time limit has run out you will then pay $1.49 for this game. If you have an addiction for physics this may be a good one for you. Check it out now!