Good, but too short.
So this isn't all that innovative, kind of like the billions of room escape flash games out there. However, the graphics were good, I didn't encounter any programming bugs, and the difficulty of the puzzles progressed nicely, though the puzzles themselves were not that imaginative. The biggest problem I had was that, with a 3 room tutorial and a save-load feature with 9 slots, I was expecting at least 30 rooms in the entire game or something. When it turned out there were only 9 rooms (or whatever it is) I was really disappointed. The Crimson Room kept me occupied for longer than this.
Overall, still a good game.