By the way, the Escape key should toggle edit mode and backspace should take you to the main menu. Perhaps there is a keyboard mapping oddity based on the machine you are using. I'll provide two alternate keys and perhaps an onscreen button to click for both to (r)eset/(r)etry the current level and go to back (h)ome.
(e)dit - toggle edit mode (also Escape)
(h)ome - go to main menu (also Backspace)
(r)eset - restart current level
By the way (R) and (H) work all the time (Retry & Home), and the additional keys will be relevant for when you are in edit mode - the entire list of keys is as follows: I'll try to make a help menu or at least list on the Itch page instructions for each key.
l,s,r,h,e,w,d,g,<space>,<backspace>,<escape>,<enter>,<ArrowKeys>