It doesn't show anything after the "made with Unity" on Ubuntu 18.04 x64. Console output says:
Unable to preload the following plugins:
A downloadable game for Windows, macOS, and Linux
You are Astérion, the Minotaurus. You have to get out from many mazes. Psychedelic, LSD trip, ENTER THE MAZE is an easy and relaxing game.
Click download now to get access to the following files: