- If you enter some screens from above (e.g. x1013y993), you can reach the Sign objects near the top of said screens. This is most noticeable with x1015y993 which has an empty Sign B object there.
- If you buy the sewer key at Kimbits Donuts, the flag warps at x1011y989 and x1012y998 will work as if you got the key from the bully.
- At x1018y1019 and x1018y1020, you can go to the right and end up in ending 3 if you have the run, high jump, and umbrella powerups.
- x1007y1003 has its music set to 1.
- If you enter the Red Rooms before buying the run powerup, the player character's shoes will retroactively vanish from this plane of existence and someone else's jogging shoes will conveniently show up near the exit for you to steal.
I'd also bring up the wallswim stairs, but judging by the death objects there, you seem to be aware of those. Also, minor nitpick, but i was kinda disappointed when i tried to fight the older gentleman after improving my fighting skills, and ended up losing anyway.