Why would you need to build the game

If for your mod you had to modify the source of the game (stuff inside the src folder which is later built into TaggedEngine.exe), you somehow need to make that .exe out of it

The default love2d building process is explained on the love2d wiki, but i will explain it here for people who don't understand the default guide.

WARNING: YOU NEED LOVE2D ON YOUR SYSTEM TO DO THIS!!!

How to build the engine

You ZIP the stuff in the src folder.
You rename the zip to src.love
Open CMD in the main game folder
Put the src.love file into the main game folder

IF YOU WANT TO PLAYTEST BEFORE MESSING WITH THE .EXE

Run "C:\\Program Files\LOVE\love.exe" src.love --fused

Run copy /b "C:\\Program Files\LOVE\love.exe"+src.love TaggedEngine.exe
If you want to change the .exe icon, use something like Resource Hacker

Now we have a fully working TaggedEngine.exe! From now on you can delete the src folder and the src.love file.