Yes, I made it through several nights. After a night, I can choose a new card. If I choose a building, it is added to my playable cards, if I choose an upgrade, nothing happened. So basicalli after playing my initial cards, I can play one new card at most per day but often, I can do nothing at all.
You can move your existing buildings around, you need to defend & get more gold making buildings to get new buildings. The upgrades are having an effect, it's sometimes just stat changes
