itch.io

So I bought it and have 4 download links. Exactly which one is what? I assume first one is the game but what exactly are the other two?
There's "INHEAT-Electra video system test". "INHEAT 0.75 Legacy Build HF" and well I know the last one, it's blender models  pack.

Trying to play the game. Dowloaded off Mega. Trying to Extract all from the zip file but "You must change permissions for this compressed (zipped) folder".
How?