Nice work :-) I have a side project with the same goal. Some ideas:
- Once started, no way back? How about double-click?
- Background images would be nice, custom CSS?
- How about loading URL contents (e.g. from github)
- Auto agenda / TOC?
- Support for Math, Charts, Code?
- Export as single html?
- Localstorage history?
- Standardized GH repo layout `markshow` for listing, loading and showing all my presentations?
This is basically part of the feature list, I would like to implement for my personal tool.