I'm typing this as I play through it:
In Random Hallway, coming from the left, I don't like how close those spikes are on the floor. It's one of those deaths you can't see coming.
In Spike Room, the checkpoint is in a bad place. If you die in another room and respawn in that room, you get killed by the platform pushing you into the spikes.
There's a collision/alignment error in the top right corner of Processing Room Exit.
In Processing Room, personally, I would put spikes in the ceiling of the right exit, so players don't walk right into the spikes in Too Close for Comfort. Also, again, this is just me, but I would put spikes underneath that trinket instead of a teleporter token, so the player knows they'll die if they just fall right in. There's a couple more unforeseen death points like this in this level, but I'm guilty of the same thing in my level.
There's another collision error if you fall at the bottom left corner of Storage Room Exit.
Are the enemies in Secret Passage suppose to be impossible to get around?
There's another walking right into spikes moment in Lab Hall Pt. 2 on the left.
In Computer Storage, I would put that checkpoint on the right at the base of the spike shaft, so the player doesn't have to make that little flip every time he/she messes up in the next room.
That's all I've found so far. I haven't gotten all the trinkets yet, though.
