An interesting issue - I was able to make a very basic level, basically my player on some tiles.  I was able to export the game.  At first, the game icon would not show up and I was getting the circle with a line through it, but after a while, that cleared up.

Still, a double click got me a black screen.

I opened the package contents and ran the game launcher and here's the errors that I received - is there any way I can work around this?  I made my character and the tile in RPG in a Box, no outside materials, no SFX, just the two pieces.

"Last login: Fri Jun 16 07:14:58 on console

/Users/kirkmarkarian/Desktop/ANOMIK.app/Contents/MacOS/GameLauncher ; exit;

arguments

/Desktop/ANOMIK.app/Contents/MacOS/GameLauncher

ERROR: create: Condition ' !create_func ' is true. returned: 0

   At: core/os/mutex.cpp:39.

nscreen count 1

Boot splash path: res://icon.png

SCRIPT ERROR: _ready: Invalid call. Nonexistent function 'hide' in base 'Nil'.

   At: res://game.gd:289.

SCRIPT ERROR: update_mouse_ray: Invalid call. Nonexistent function 'project_ray_origin' in base 'Nil'.

   At: res://game.gd:1302.