Thank you so much for the feedback! It's really appreciated!
Yep, the doors are not scaling correctly with the resolution currently - unfortunately I only found this when testing with a non-default site resolution and in full screen mode after the jam ended :(. Will fix it in the after game jam version! Will also make sure to include the controls in the Description ASAP. You can actually hit "[Escape] to cancel the building mode and [Delete] for deleting placed tiles, but it just shows that this is not obvious at all. Thank you!!!