I read this book when I was a kid so I only remember a few details, but I really want to find it.
It was about a kid who I'm fairly certain gets trapped in his video game because there's one part I remember very clearly about him being in a temple (I think it was filling with a black liquid? There was some kind of timer) and it was a level he had never been able to beat because he couldn't figure it out. I'm pretty sure the Mayan calendar was somehow involved.
I also know there was something up with monkeys. Specifically, I seem to remember a one eyed monkey being important. (I recall something about that monkey appearing in a dream?)
EDIT: I'm not so great with time, but I definitely read it before 2013. I'd guess I read it between 2009-2013. Again my ability to pinpoint time frames is nonexistent, but I hope this helps!
EDIT 2: I was kindly directed towards a list of things to add, so here are all the questions I can answer.
-I recall it being a complete novel and I don't believe there was a sequel
-There's an extremely high chance I got it from the YA section in a barnes and nobles
-It was in English
-I believe the setting was in South America (that's where the game was set) and there is time spent in a rainforest
-I remember very clearly the character freaking out in the temple because if he failed again, as he always had, he wouldn't ever be able to try again because it wasn't a video game anymore.
-I'm fairly certain the main character was an American adolescent boy
-The scene I keep mentioning at the temple is why it's memorable for me. The internal panic was something that struck me
-The book wasn't particularly old, I bought it around the time I read it.
-The one eyed monkey was also very memorable. I think the mc had a dream about the monkey before he ended up in the game, and it was one of the first things he encountered in the game