Means you need a better computer. 'nuff said.
But yes I have spent many hours playing this game, it's really fun.
Btw, if anyone finds a fun server or creates a server for CP ya'll should post it for multiplayer fun.
ATM, I am building a water slide by my house and trying to make a dungeon using a monster spawner but it's hard to make it fun.
Also if ya'll didn't know, you can have custom skins and modify the textures for the game to make it more pleasing to play.
Just download a texture pack, go to your AppData folder in your User folder, find Minecraft under Roaming it should be the exact location:
C:\Users\XXXXXX\AppData\Roaming\.minecraft\bin
where XXXXXX is your user name on the computer.
After that you open up minecraft.jar using WinRar or a 3rd party application and then move it over.
DO NOT EXTRACT HERE OR EXTRACT TO A FOLDER JUST OPEN IT UP TO MAKE THINGS EASIER ON YOURSELF

For the texture packs, just use Google, I'm sure you will find something or another.
Also, if you want to just build something and don't want to spend countless hours searching for diamonds or what-not, I suggest downloading
INVeditAnother App you can use that is useful would be the
Cartograph, basically what this does is render you a copy of the world you want as an image or say you wanted certain blocks like Diamond, search for the Diamond on the
Minecraft Wiki which is:
here. Then you can render a normal copy of your map, then another with only the block Diamond on there which the hex value is 56. Put the diamond on top of the other one and you can see where all the diamond is. Also it shows your world you created which is pretty sweet. For examples just look on the Cartograph thread and it has examples in the first post.