Unfortunately; just as Gabnificent said; the '.pck' file is missing. You were likely using Godot, but the default export settings will create an exe with a dependency on a '.pck' file. There are ways to create a standalone.exe, but otherwise - for future jams, simply submit a zipped folder containing all the stuff that Godot generates when exporting.

Unfortunately couldn't play it, it says a pack file was missing? :(