Your page says movement is WASD, but it is arrow keys in game...
It also initially opened on my second monitor (weird) and the window is very small on my 4k display....
Needing the mouse for menus while it is not required for the game is a bit awkward.
And once the door 'opened' it was so hard to see I often couldn't find it at all.
I really dug the music, though, so despite all of the above, I just kept playing!