The playing field consists of a number of platforms, interconnected by ladders. Most of the platforms hold dominoes. G.I. Ant can rearrange and move them, by carrying one domino at a time. He is allowed to push one domino, and this single push should result in all of the dominoes falling, which opens the exit to the next level. There are various factors that can cause a level to not be completed. As well as toppling all of the dominoes in each of the 100 levels, G.I. must be physically able to gain access to the exit door once the dominoes have fallen. If a ledge leading to the exit has been destroyed, or a gap leading to the exit has not been bridged, or if a line of dominoes lie across the exit, G.I. will be unable to reach it. Each level also has a time limit during which it must be completed. If the time runs out, however, the player is still able to continue playing if they wish to attempt toppling all of the dominoes. By pausing the game once the time has run out, a small hint will be displayed, giving advice on how to complete the level. As a side note, the hint for level 98 informs the player that the game's designer cannot remember how to complete the level.