Textastic only has a few features, but those features work quite well. I look forward to a more feature-filled text editor, with tab-based file browsing (instead of each file opening in a separate window), and the ability to open an entire folder full of project files, with an in-app file browser (similar to other popular text editors.)
If you want to open Textastic from the command line, edit the file: ~/.bash_profile
add this line to the file: alias tt=open -a Textastic "$@"
then to open the app, type this: tt
To open a specific file in the command line, type this: tt filename.txt
Keep up the good work!