I think its pretty good as its fast, intuitive, and well labeled (pickeR, I like that and wish it were standard in every menu in existence that has keyboard shortcuts.
). Well thought out I must say since the arbitrary character set approach was the best coarse of action and the export format will get a lot of use for native uses for ASCII/ANSI images on all systems that use them.
Line tool is a good start and I look forward to any other common paint tools like Fill when you add them.
I don't quite understand what Erase is doing or how it works?
Its certainly easier than manually inputting such images, that never stopped me though since a family I knew had an old computer and I'd spend hours typing in drawings one line at a time.
Overall very good, I like it.