The Donkey Kong game at Arcadeonline.com is similar to the old school Nintendo version. The basic concept is to get as high as you can. This refers to you climbing up a ladder and avoiding the barrels that Donkey Kong throws at you. It says, "How high can you get?" and your mission is just that.
Your objective here is to save Mario's beloved princess. The game starts out with Donkey Kong climbing up the room while holding onto the princess. He then stomps down hard to make each level tilt and become wider on some parts while narrower on others. The princess is held captive right next to Donkey Kong and yelling for help. The directions are quite simple. You are in a room on the bottom floor. 6 flights up are Mr. Donkey Kong and the princess. To get up to her you must climb up ladders, but watch out some are broken and can not be used. The ladders are the least of your problems. While climbing up you have to avoid the barrels of fire that Donkey Kong is throwing at you. They explode on contact with you and you die. To avoid this gruesome death, you have the option of jumping over them using the space bar. Using the spacebar will actually get you to moving faster and you may even beat the barrel's path.
It seems that the faster you move the more barrels that come at you. They do not just roll down each level and fall off the screen. These barrels can climb down the ladders. Be careful when you attempt to climb a ladder. Always be one step ahead of the barrel and sometimes the shorter ladder is best. The barrels like the ladders that are more accessible and are a longer climb up. Once Donkey Kong throws a barrel in your direction it either runs you over, falls into a trash can that is on fire, or it just keeps on rolling. It is like Pacman with fire and barrels instead of ghosts. When you jump over the barrels you earn points. It is usually 100 points. A little trick is that the barrel's path is 9 times out of 10 always the same. If you watch closely and have a good memory, it will be smooth sailing to saving the princess.