The source file contains all the files in the game (music, sprites, animations etc.) and the source code of the game. Note that you cannot use any files to your own projects without our permission. Email me EmperorsServant[@]gmail[dot]com to ask for a permission.
The exe file contains only the game.
Both of the files have to be extracted with a proper program (WinRar etc.) and needs to be installed. In case of the source version, head down to the release folder and double-click the setup.exe file to install it on your computer and in the case of release version, just open the folder and double-click the setup.exe file to install it on your computer . The game should now automatically open and you're ready to play the game! The game should be avaible in your Start Game menu, but in case you can't find it, just click on the setup.exe again!