They look great! Good job. Now I can finish some stuff. Now, what should we with the doors: magic portals, regular doors, stairs, holes in the ground or something else? I don't need any assets for these yet, so they are a low priority.
I think the doors should work like hollow knight or Metroid, where each room is in its own little world. This is both easier to program and it will fit the theme better.
Finaly, I think we have time to get a low-level/first boss, if not more (one for each level?). So, what ideas do you have for some bosses. Maybe a plant boss for the first level?