Thank you:)
Yes, there should be keys within the game. The first one is located at the end of one of the corridors, while the remainder are contained within each of the locked rooms. To reach the first key from the start of the game, head down the hallway to the left (past the octogonal pillar), this path should wind a bit until it comes to a dead-end with a skeleton and one of the intact grandfather clocks.
One of the other problems that I was unable to rectify prior to the deadline was the camera system, which had a tendency to wobble during encounter with the transparent ghosts, due to constant over-corrections with the lock-on system. Hopefully I'll be able to remedy this so that the display becomes more stable.
I'm glad you liked the game, and I'll do what I can to fix the issues:)