I finally got it to work, and then I noticed it was VERY similar to another mod, and I felt the level was the same. The game is also a bit too hard for Chex Quest.
0_o; I'm not sure how it's possible that my level's the same, since TGA and CC can attest to me using Doom Builder 2 all day trying to make a hard level that wasn't too short...
BTW: It's meant to be hard. I generally make levels that are WAY TOO EASY, so I was purposely saying to my self "what characterizes a hard level for me..."