Some of these point awarders are already outdated.
1. Make a Food Stockpile
Because of the addition of food stacking ,cooking ham and fish,Isn't complicated anymore because you can stack food in a oven as of Beta 1.8. Also, cookies were added in Beta 1.4, so another food item is in the list. Prior to 1.8, they could be stacked up to 8. You should increase the amount of required food.
2. Be to Dye for.
You can see in the description: no brown unless implemented. When brown dye was added in Beta 1.2, they couldn't be obtained without a inventory editor. They can now be found in dungeon chests. As of 12w18a, cocoa beans can be obtained from jungle leaves and in 12w19a, you can get more brown dye from cocoa plants
3. Build a cozy house
Chisled and Smooth Sandstone was added in 1.2.4. They should be used for the house instead of normal sandstone. Also in 1.8, Glass Panes were added. These could replace the glass. Jeb might be crazy, but in 12w30d, sideway logs were added. This could be used for the cozy house.
4. Ride the Train
In Beta 1.5, Powered and Detector rails were added. You may easily make powered rails from a chest. I ain't gonna tell you where the chest is.
This difficulty modifier is outdated.
1. Hard Core Mode
Hardcore mode was added in 1.9 prelerease 2. When you died, your world was deleted. You can change your difficulty to hardcore using SPC saying the hardcore command. Your difficulty is locked in hard mode.
About the save file. Due to the addition to world naming and more world saving in Beta 1.3, you can keep the name of the zip file. Back in Beta 1.2, You could only save up to 5 worlds, and you couldn't name your world. If you clicked on an empty file, Minecraft will generate the world. Seeds were also made in Beta 1.3. I recommend to use seeds to make a world.