Pretty decent start. Not keen on the login stuff, thankfully it has a guest local save that works very well. I've hit a bug where offline time being calculated every time I tab out will discard all progress upon entering that offline time calc. Can be remedied by manually saving before tabbing out, and I sent an issue about it on the github.

Edit: Issue resolved: https://github.com/Mezeman1/idle-ant-farm/issues/27