Added a new monster and fixed some bugs. — Amazing Fix Steam update #1473021

- Addition of a monster: the mimic chest. - There is even more chance of getting a missing item when opening a chest. - The spider web is more visible in the bathroom. - Spiders are now targeted by the insecticide. - Fixed a case where the red circles appeared when finishing a category using a tool. - Fixed a few cases where the move count could be bad at the end. - Made more robust the save after receiving the reward in the win menu.