Hehe :D Thanks for the feedback. Based on the comments, I think I've underestimated players ability to escape from that monster. I wanted to give a little mercy to the player if there would be some misclicks when opening doors and hatches.
But in next game, no mercy! ( ｀▽´)Ψミ(/・ω・)/
That is a good idea to add another key to open doors, and I actually tried to implement it. But it had some issues with that so I gave up because it would have taken more time to fix it. Also you can play the game with your friend. One moves the character and the other opens doors and hatches with the mouse ^^