Bridge Constructor Portal

Bridge Constructor Portal launched to positive fanfare. The game combines
the puzzle building of Bridge Constructor with the quirky characters,
environments, and other elements of the popular Portal franchise. Players
build bridges for vehicles to travel through. There are obstacles and
various dangers to overcome as well. This is an early candidate for game
of the year. It also features a flat price, no in-app purchases, and no
advertising. It's really quite good.