How can I start playing this game?

[quiznos00]

The game there is Tile World, which is a free emulation of the Windows and Atari Lynx versions of Chip's Challenge. It was designed primarily as a replacement for the Windows version of the game, which could not be purchased legally until Chip's Challenge was released on Steam last year. Most people on this forum still prefer to play Tile World rather than the Steam version of CC1.

You can download it here: http://www.pillowpc2001.net/TW2/download.html