It's an interesting idea, but I for the life of me could not figure out how the bird gas detection worked LOL
But if you polish the bird mechanic I think this game can be really good!
I kept dying in the room with rats, and every time the bird would cry out in a different frequency. At the start I thought chirping = gas, but I guess not...
And also, when I respawned, I lost the key that I brought with me from the previous level, and I don't think I can get further without it, since there's 2 doors on the rat level...