Here's the relatively unedited text file I kept adding to during my plathrough:
1. Game Breaking
I believe it's possible to get all the way to x1020y1018 without the run power-up,
after which you are irreversibly stuck.
2. Medium
Wallswims
Wallswim walking from x1028y1034 onto x1027y1034
Wallswim climbing from x1028y1041 to x1028y1040
(should these walls even be climbable?)
Possible to jump up to x999y1041, and then into previous scene off right screen edge.
x1074y1016
Can climb into above screen on invisible blocks,
Also often collide with them trying to make the jump.
In general, they are terrible.
Missing Files
The circuit background robot infested area attempts to play Ambi24.
The Grassland Ruins Tower area (x989y996 and onwards) attempts to play Ambi23.
The White Danger Pyramid Zone attempts to play Ambi25.
Oddities
It's possible to leave key-maze-puzzle-zone with only a purple key,
or with both a purple key and a red key.
And shifting out gives you a blue key? What?
3. Minor
SGEs (Knytt-speak for Small Graphical Errors)
x986y984
Corner tile missing at top right of purple platform
x984y984
No outlines on cliff?
x982y986
More missing edge tiles.
x1008y984
x1008y993
x1007y983 (matters less here)
etc.
No outlines on ceilings.
x1000y1033
No water on kill tile.
x1010y1033
No water on save tile.
x1011y1033
Ghost spike trap only obscured by waterfall on bottom tile.
x958y1000
Kid overlapping solid object moves superfast on room start.
x1065y1017
Missing corner tile at top exit, snow particles spawn in wall and get destroyed.
x1067y1012
Grey square in top right corner.
Difficulty
x981y986
Found this screen impossible. Have a feeling worse is in store!
The Abyss is ridiculous.
Past the area with metal BGM I just started cheating constantly. You know what, just disregard this section.