Do you guys think there exist a glitch where you can get through the key door without a key? For example backwards long jump through the key door? I have tried doing it myself without luck, but I am pretty sure you can glitch through that door!

What do you guys think? I'm curious.

You need a key to open that door, and the door doesn't hide a loading zone, you NEED to open the door to go upstairs. Otherwise there is no way to beat the game, 0 key is impossible.

Also yes it is possible to clip through the door, but it gives nothing.