I bought the game here, then I downloaded the Windows files to My Documents. Then I extracted the files and tried to start the program.
It opened onto a screen, but it was just black and white and changed my cursor appearance.
Error Log, file name: pixelover_2022-06-11_19.05.45

Godot Engine v3.4.beta.custom_build.550bc79f6 - https://godotengine.org

OpenGL ES 3.0 Renderer: NVIDIA GeForce GTX 1050 Ti/PCIe/SSE2

OpenGL ES Batching: ON

ERROR: Index p_column = 1 is out of bounds (cells.size() = 1).

   at: TreeItem::is_selectable (scene\gui\tree.cpp:452) - Index p_column = 1 is out of bounds (cells.size() = 1).

ERROR: Index p_column = 1 is out of bounds (cells.size() = 1).

   at: TreeItem::set_icon_modulate (scene\gui\tree.cpp:212) - Index p_column = 1 is out of bounds (cells.size() = 1).

ERROR: Index p_column = 1 is out of bounds (cells.size() = 1).

   at: TreeItem::is_selectable (scene\gui\tree.cpp:452) - Index p_column = 1 is out of bounds (cells.size() = 1).

ERROR: Index p_column = 1 is out of bounds (cells.size() = 1).

   at: TreeItem::set_icon_modulate (scene\gui\tree.cpp:212) - Index p_column = 1 is out of bounds (cells.size() = 1).

ERROR: Index p_column = 1 is out of bounds (cells.size() = 1).

   at: TreeItem::is_selectable (scene\gui\tree.cpp:452) - Index p_column = 1 is out of bounds (cells.size() = 1).

ERROR: Index p_column = 1 is out of bounds (cells.size() = 1).

   at: TreeItem::set_icon_modulate (scene\gui\tree.cpp:212) - Index p_column = 1 is out of bounds (cells.size() = 1).

Steam version does the same thing on my computer.

I've been tinkering to try to fix it, and I figured out that if I open it in a windowed mode, that I can start seeing things sometimes if I manually shrink the window.

It was semi responsive

And now I seemed to get it to super specific right size and now I'm able to use it I think?

Edit: Hmmm, it only works in this exact windowed resolution.

If I make it smaller or bigger it freezes and becomes unresponsive again.

Hey, following what I said on discord, could you try if you reproduce with the new version please ?