Your professor is beginning to bore me.
Read those and people will have pointed out many technical issues.
On your particular logo…
IKEA is a big huge humongous warehouse store. That logo goes on the side of the building and in the right location can be seen for miles. Print your logos out on a piece of paper and tape it to the wall. Stand back and look at it. What can you NOT see?
Really tiny type, subtle color changes and really skinny black lines = no good
Drop shadows in logos = bad.
5 colors = bad
While the Mondrian-esque piece isn’t so bad, the contrast of the black against the blue is not working. (do not put yellow letters on blue and vice versa. ) Don’t overpower the name with the concept of flat boxes. IKEA is already a known brand. Have a darn good reason to do what you do to it.