Make this the install instructions:
First, download any .ptlv file, then show in file [WINDOWS EXPLORER]
Then, press the windows and r key at the same time.
In the Run app, type %appdata% then press OK
Right after you get into roaming, go back to appdata and go into local.
There, you can find PizzaTower_GM2 [If you have the SAGE 2019 demo, you may notice its been replaced by the level editor.]
Go into the folder, then into levels.
Drag the .ptlv file in the levels folder.
Now, open up the game and you'll see the file you downloaded!
thanks for putting this as the instructions if you did
P.S: If you mind, change the fake peppino boss fight.ptlv name to peppino boss fight.ptlv to avoid spoilers. Thanks!