I don't see any options for pomodoro notifications that aren't sound based. If a user has a quiet office environment (computer sounds disabled) or is deaf, there's no way to know your pomodoro is up without looking at it all the time and just noticing the icon has changed from tomato to coffee cup. Kinda defeats the purpose of the thing.
It would be great if there could be options for the pomodoro to bring the app to front or make the overlay timer window flash the accent color a few times or something. Just something visual instead of audial.