Actually, lately I'm writing something looking like another possible idea. It's kinda time-consuming though, so I still didn't get to the some important aspects. But here, see what I've got so far:

The main character has no special abilities. He's a rather usual student, perhaps 23 years old or so. He delivers pizza and lives with parents. In free time he constructs a teleportation device. His project exploded twice already, blowing up the whole room, so no one except him and a group of Star Trek fans from neighbourhood believes it can ever start to work. However, one day, it apparently starts to really work. He manages to successfully teleport his hamster. His hamster is named Bob. It’s his third hamster in fact. The first one died when the device exploded for the first time. The other one burnt to ashes during an attempt to teleport him, a few weeks after the second explosion. They were all named Bob, even though one of them was a female. That was mainly caused by the boy’s laziness and putting little care when it comes to name choice. Later he also noticed it greatly reduces emotional pain after a loss when the new hamster wears the old one’s name. He tried the same experiment on humans, but - for reasons he couldn’t understand - his girlfriend left him immediately after calling her Bob, and he didn’t feel like it reduced his pain at all. That’s when he learnt that things which work with animals don’t always work with humans. Nonetheless, the device worked on his hamster and there was no other way to test its ability to transport humans than to use it oneself. Well, he actually managed to think of another way, which was finding someone naive enough to check out the device in his stead. Obviously, there was no simpler option than using one of those Star Trek fans hanging around. Surprisingly, the device worked really well, teleporting the whole body of a volunteer onto the other side of the town. And furthermore, he was still alive and his mind functioned flawlessly, at least to the extent it did before. The very same day, the fan decided to describe this event on his blog, widely known as spockblog46729D3. He had no idea what consequences will it bring...

The device consists of two separate components: the transmitter and the receiver. The first of them looks like a typical belt and, as such, is wearable, although might feel a bit heavy. It’s teleported along with its user. The receiver is shaped like a bowling ball, but is a bit lighter than one so it can be thrown on long distances. The mechanism can be referred to as the Bowling Ball, abbreviated to BoB. The game-play should mostly concentrate on various uses of the device, the simplest of which would be just throwing the ball onto otherwise unreachable platforms or through thin holes, but also possibly dropping it from above to stun guards or using it to make noise in some place while sneaking elsewhere. Naturally, there have to be more possibilities to keep a player interested. Also there should be sections where a player doesn’t have the Bowling Ball at all.