Help identifying a movie – any tips?

The little info i have: made after 2001 probably a ‘b’ movie (no famous actors & probably not hollywood) plot involved solving riddles/a game (possibly an alternate reality) computer technology/cyberspace set in the modern day, in a city two young people becoming obsessed and getting in over their heads etc final scenes in an abandoned basement lit by florescent lights clues left on the walls thanks for any pointers p.s. already tried searching plot summaries/recommendations on imdb, asking local video library for a print out of my account, and searching by hand in the store.
Answer
Jumanji?zathura?the number 23?