Note: Since the Unstable Castle Update was released, several patches have been shipped, so you might have already tried some of these changes, but here is a small overview.
Language
Spanish and Russian versions can be tested (community translated, and still WIP)
New:
Castle chest update: Item quick stack both ways (not dragged)
Hold shift to send 5 stack
Right click to send 1
Crew can go to level 20!
Crew learn skills on level 4 and level 10 (previous level 2 and 5)
Crew experience (XP) is raised per battle, and rebalanced (you can get more experience with higher intelligence)
8 more enemy castles (including some from the Octopus faction)
Changes:
Very Hard enemies are slightly stronger if you are also strong
Enemy wizards are somewhat slower, and are even slower if they have many wizards
Enemy wizards use a new spell layout (less likely to spam the same spell)
Enemy steals less gold if they win a siege (it will still hurt)
Some spells now have more duration before the effect is removed
Crew walk speed is lowered on lowest level
Various other crew stats change
Bug Fix:
Game crashed if crew reached level 11
All castle decor modules are destroyed when the first module is destroyed
Crew follow in caves with trapdoors and elevators. The crew that follows you now waits if you fall down a trapdoor, and can follow you in elevators.
Safety behaviour (prevent soft lock) for crew follows: if they have no path to rowboat, they will teleport.
Death touch spell did not always work on enemies
Player could be stuck if holding movement down while exiting rowboat
Player sometimes moved wrong direction after a vertical movement
Player could walk off the screen when inside
Sometimes Castles have 1-2 health when all modules are destroyed
Player crew did not deselect enemy castle target if the castle wall is destroyed (removed)
Permanently losing equipment if exiting Castle HUD using ESC while holding equipment
Redcoat castle without interaction: Mistake in build. It will be a feature castle position.
Rare bug when exiting Castle HUD using both buttons and at the same time using ESC
Enemy wizard's spell Silence did not work against player
Castle Bridge could use Decor as horizontal support