After completing 5 or so levels I can say that this is definitely an interesting idea and I can clearly see where the developer was taking this game, the only thing missing from this game is just some more polish. Here's a couple of thoughts:
- I didn't like the fact that you can only see 3 rooms at once. While this makes the game look simpler it actually adds a lot more difficulty to it. This is due to the fact that you just simply can't see what some of the triggers do because they were in rooms that weren't visible. I would rather have the game show all the rooms horizontally and showing them all at once.
- Another thing I thought about would be a visual guide where the player would end up if he changed rooms. Because right now you have to either count the rows and columns of the rooms, or just spam the change room key until you end up where you want to be. Some sort of ghost could fix this issue.
- I missed some sort of OST in the background. A puzzle game should have some sort of audio in the background.
I hope these thoughts help you polish the game. I can definitely see the game becoming bigger with more complex levels and more polish. Good luck and keep going!