misalignements on:
mind the ice cubes (the section of the first checkpoint)
simple. trust us (the dead end is too close to the edge, it glitches if you fall in it)
fragile. fall with care (you MUST put a wall below the spikes)
the dimension is sky dangerous (not sure of the name, spikes too close to the edge, those things may cause glitches with invincibility on and the unexpected death is not a good way to go)
... viridian can't jump (the spikes, once again too close to the edge)
EDIT: nicely fixed your face2 level! you missed a tiny misalignement on two of the warp walls of "who said it was hard/easy?" but it's a huge improvement. congrats. as a gift, here they come both faces fully fixed:
