I have a question. Why are there 4 links called Part1, Part2, Part3, and Part4? Is this a series of 4 games? Could someone explain this to me? I'd really appreciate it!
I will try to explain it to you, but its late for me so i'm sorry if there are any typos.
These 4 Parts is the whole Game, just in tiny bits. Its like when you have a large block (The Game), that is too big to pass through the Door and would take too long to push it through. So you cut it in 4 pieces (The Parts), so you can push it thorugh the Door faster. In the end you must put these Blocks together to have your big Block. Or in other words.
Not everyone has a good internet connection to download large files at once.
So you download these 4 Parts and put it in a Folder of your choice. it is your choice if you choose MEGA or the other two.
Then you use Winrar or 7Zip (I only use/know these) and unzip the parts. You click one of the 4 parts, that must be in the same folder, and click "extract here".
Now you should have the Game unzipped and playable.
Hope it will help you.