For having a relatively low budget, the film's style and overall art direction are immensely impressive.

It's funny, it's tense, it features two great performances from two actors and the director expertly creates a web of odd tension where you actually don't know what is happening for the majority of the run time.

Yes, absolutely, there is fun to be had, as well as many, many things to go boom, all amid an atmospheric urban jungle.

It is neither dumb nor smart enough to be fun, and spends way too much time with its boring human characters.