Normal mode is locked because it's only 1/3rd done and so overconfident newbies don't try it out and get disheartened.
The release plan is Steam for Windows, then Steam for Mac and Linux, then DRM-free for all of those (itch.io and maybe Big Fish Games if they'll have me). After that I'll try out mobile and figure out if I'd rather port it or just move onto another project.
Thanks for the feedback!