Everything imports and resolves correctly - even with the downloaded "Cats" game files you linked to... But, when I hit "Run", nothing happens. The black box appears and no game is produced.
I'm running Google Chrome Version 58.0.3029.81 (64-bit) The newest version.
Also, the editor is picking up non-existent "ghost" images in the hidden objects (assets) bar, adding a half dozen invisible pixels as hidden objects throughout the image. As seen in the screen shot. The image is a transparent .png file with no extra images besides the assets on the layer.
Also, when exporting the files as either Mac, PC or source code, the files will not open or run.
Hopefully there's and easy solution!