Great read! Fascinating how deceptively simple the development of this kind of game can seem at first glance, and yet so much is going on under the hood; like a case study on Steve Jobs principles on good UI, which is invisible to the user.
Many valuable lessons, notably how sounds play into the theme, and your focus on effective use of screen estate.
And thanks for sharing your prefered font editing tool and the Argent pixel font. I developed a passion for pixel fonts since I discovered the work of Susan Kare on the Macintosh system. This will come in handy I’m sure.