I thought the overall mood in this game was fantastic but that the actual game elements were lacking.
In the Asteroids minigame, it said I had to survive for 60 seconds but nothing actually happened at the one minute mark. The game just went on indefinitely. In the Donkey Kong minigame, the controls felt like the character was floating and moved very slowly, which is an issue in a minigame all about precise timing and control. I also couldn't get the Mouse Maze minigame to work at all. It just kept flashing back and forth between the title screen and the start of the game.
There also didn't seem to be any correlation between completing the minigames and preventing the nightmare from coming through the window (which I assumed was the main goal of the game from the description). It feels kind of futile playing the clone games if they have no impact at all on the main game.
However, like I mentioned before, the atmosphere was really well executed! The artwork was beautiful and I liked how each minigame had a different, distinct look. Audio was great as well!