Looks like liftoff is a fork of Lemmur and the development is continuing.

The Lemmur github says the project is abandoned.

I do a similar thing. it’s essentially an open face onigiri in a bowl with leftovers like sliced cucumber, red peppers, celery, avocado, tuna mayo, furikake and pickled ginger (if we have any). I also like to put unagi sauce on top with sesame seeds.

pretty versatile and tasty. I also like to make a breakfast version with eggs and bacon.