I need help Finding or how to create a 30 minute trial creator for games?

Question

Ok lets see i don't see why this is so hard to find but it is First i will start with what i am doing i am trying to make demos of games that i make all i need a is a program that lets you make a 30 min trial of a game like big fish games have but it's impossible to find i just want it to stop being able to be played after 30 minutes and if you hit the buy it now link on the nag screen then it takes you to my sites shopping cart with the game

so

i need a 30 minute trial creator with a nag screen that makes it unable to play after 30 mins and just has a link that say trial over please order below and if you click the link it takes you to were you buy it HELP HELP HELP

Answer 1

Create a copy of your game. Include in the startup process a date/time function that gets the current time from the Users computer. Then have a loop that checks the time. When the 30 minutes are up, open a pop-up window with your link to buy the game.
The copy they buy is the original copy without the date/time function.