Just download the zip file, extract the contents to a folder and run the executable. Make sure the .pck file is in the same folder. Windowed mode can be toggled by pressing F11.
Daniele Martins - 3D Artist
Vinicius Kleinsorgen - Designer, Editor, Scripter
William Tumeo - Godot mentoring and coding
Sound effects from the free 2018 Sonniss.com GDC Audio Bundle
Special thanks to everyone at Aiyra and to the developers of Godot Engine