The game atmosphere is well conveyed through the modified itch.io page. The pastel purple fits really well with the other contrast colors, and helps with accessibility.
While the buttons on the main menu are a bit dark, which could be improved by a better color choice, the buttons on the game view are especially vibrant and provide an excellent contrast to other game elements.
By using a main menu button through which the user can go back to the main menu the developer ensure user control and reduces errors.
The clear labelling of the buttons show well understanding of proximity and also help with providing a minimalistic interface.
The overlay in the main menu scene is very nice and also allows the user to view the modelled 3D background which gives depth to the scene and furthermore helps with distinguishing UI elements from Ingame objects.
As a big bonus I find the flower on the main menu scene as it just really fits the theme "cheerful yet horrifying".