Thanks for playing!
The blueish key with two handles was my attempt at drawing scissors on an 8x8 grid lol
The gas canister and purple lock are optional things you can use to unlock an alternate ending. And as for that door behind the wall, that's where the front door actually teleports you (you aren't meant to see it but I forgot to get rid of the sprite whoops)
Thanks again, and good job on making yourself a map! Love the dedication!