An update has been released with the following changes:

• The final boss is finally playable. Oopsie.
• Anna now always appears in the final cutscene.
• Added a shadow to the ending credits to make them more readable
• You can now replay the final boss once you kill it without the need to reopen the game
• Updated Anna's room with objects that were initially cut due to time constraints
• Added a completionism achievement for when you get all the other achievements

Thank you all for your support!