Woah this is weird. I really like the idea of things only being visible with a certain color. Although I took way too long to figure out that I needed keys for the first and third door. My first time playing I was just spamming the color change to try and get the third door to open. Maybe a visual indication that a door needs a key would be nice? Also, I thought there would be an ending but the acknowledgement of the lack of an ending was funny. This is a cool game! Good job!