There are a -lot- of selamats, and they're all crammed in to one block here. It's why this block took me the most time to learn so far. One thing that kind of helped was just ignoring selamat, and just learning the follow-up words separately, outside of DuoLingo - but that can't be the goal...
Perhaps it would help to split off the time-related ones (pagi, sore, etc.) from the action-related ones (datang, jalan, makan) and putting them in a block related to time.