Doc Clock: The Toasted Sandwich of Time's most used mechanic is the ability to piece together random inventory objects into strange configurations in order to solve the myriad obstacles the game will throw at you.
Building complex items is really simple. All you do is you grab an item either from your inventory or in the world, and you pull it next to the object you want to combine it with. When both objects are outlined, you can let go and they will stick together exactly where and how you left them. This means you can make a bridge by sticking several planks of wood together end by end, or attach wheels to the bottom of a bathtub by resting it on top of the wheels.
I did find that the hardest part of the game seemed to be getting your lengthy claw arm, the tool used for picking up and rotating inventory items, to behave correctly. It seemed like I was fighting the device more times than not, and most of the issues I had involved trying to get the piece I wanted to attach to the bigger construction while other parts of the new invention were in the way. On top of that, there are times when the whole invention would fall over on its end, and there doesn't seem to be a way to manipulate it as a whole. Whenever this would happen, I would have to tear down practically the whole device and work on getting it back together again.
While this is really only a minor inconvenience, it is attached to one of the biggest mechanics of the whole game, and the more often it happened, the more frustrated I would get. In fact, the above mentioned times I felt like I had to walk away from the game for a bit were usually tied to events like these where the construction of my invention wasn't coming together as smoothly as I would have liked.
Despite that though, Doc Clock is still a fun puzzle/adventure game that is sure to delight most casual gamers. It is definitely worth checking out, and most likely purchasing.