here's the UI atlas I use on most of my games. They are pretty simple and generic so I don't care if you use them. You can use them however and wherever you want, you can modify them to fit what you need, just don't sell them. Each element is 16x16 pixels. The blanks are perfect for 9 slice.
Thanks for the feedback! There's actually 2 types of ending. The easy one, you just need to access all the pressure plates/switch and the top door will unlock. The other one is you need to fill up the entire room with wax in order to access the right-side door.
