I love the way this dungeon blends with the Forbidden Spires biome and it being a 3 star too!

A few suggestions/edits

Gameplay
-There are a few sections where the player falls pretty far down and would be hard for newer players to climb back up. Maybe you could add some sort of rocks, pillars, bounce blocks, or make the terrain slanted to make it a bit more climbable. 

Example slant

-Some hallways are pretty long and take a bit of time to walk through so adding some directional jump pads could speed things up

-A few rooms could have more variation to them,
A lot of the rooms are all pretty similar in terms of gameplay since they are all on flat ground with a few trap swaps.
Raising or lowering ground to a few could add some movement variety. 
A few ideas would be adding a pond or river into one of the terrain rooms, raising parts of the floor in some of the jade-themed room, adding some thicker pillars or walls structures that players could hide behind or jump on top of.

Entrance blueprint

-The entrance blueprint needs to have more ground below the top layer. biomes are not perfectly flat so when it spawns there will be open spaces that players can get into. Should be good if you add at least 5 blocks to compensate for varied spawns.

Detail
I love the  detail in the jade rooms, but a few of the halls feel empty/plain 

-Maybe adding some pillars, arches, fences or decorating the ceiling could make it more interesting.

-Last thing would be that while the terra-themed rooms blend really well together with the tunnels the jade ones feel like they cut into the environment with no introduction, 
adding a gateway or some sort of transition could help it feel more natural.

Back To active for now, can't wait to see the variations you come up with ^^