Great game! I can see the hard work you put into the visuals, the ui, the audio and the game and level design!
But I think there are a couple minor problems:
-the 90° rotation is very chaotic and each time I totally loose the sense of direction, which is nice, but I think it should be more obvious that a rotation happened (like, turning a bit smoothly or adding some visual effect so that the player knows something happened): I thought at start I was teleported!
-there are a lot of times I don't know where I have to go
-the hidden ennemies are fun and surprising, but there is a moment when there is like 15-20 zombies at the same spot, I (and my computer too) cannot manage this.