You can aim to complete every level but there is also an additional star on each level for completing in minimum moves which can be easily attained if missed by replaying levels.
While the in game banner ads do not really detract from the gameplay, there are full screen ads that interrupt play every so many levels, which takes the player out of the game. Purchasing any in game item such as more levels or themes, the ads will be removed, but for those that would like to play for free, the full screen ads may be something to consider.
There are 60 puzzles in the game, which allows the user to see how the game plays for free. There are more puzzle packs that are in-app-purchases that the user can purchase to extend the gameplay if they do like the game.
At around 3 cents a puzzle, a full packs cost can add up. This is exacerbated by the fact that most puzzles can be solved quite quickly, which means it may not be worth the cost of admission for many.
Levels can be completed with star ratings for minimum moves, specific pieces etc. This makes for a good reason to revisit levels in order to complete all tasks.
While BCP at its core is a game about building bridges so your forklift can pass, the sci-fi elements of the Portal series make it a lot more interesting. This includes sentry turrets that try to destroy your forklift along the way, gel that speeds up your forklift letting it ascend almost vertical slopes, and even portals that allow travel between distant locations, creating solutions to seemingly impossible scenarios. It's simply fun to solve the many puzzles found in the game.
While most puzzle games in this price range usually take only a few hours to beat, BCP has a total of 60 levels, taking about 10 hours for a full first time playthrough. You can even choose between a regular and a hard version of a level, further adding to the playtime.
BCP relies heavily on trial and error, requiring you to build very precise and efficient bridges that don't make much sense initially. Because of this, your well-reasoned and carefully planned bridge might not work at all, which can be really frustrating. So unless you're a really patient player that's willing to try over and over, you probably won't enjoy BCP.
It has a simple visual style that uses very little color, the soundtrack gets repetitive fairly quickly, and the story feels like an afterthought. The puzzles are the main focus of BCP, but it feels like the developers might've forgotten about every other aspect of the game.