Design, 5/10: not much graphics added by the author to make it look more of a nice looking level
Difficulty, 8/10: a very hard level, but I have seen harder ones like Bowser Castle and the Call of Duty ones
Controls: 10/10: pretty much the same as other Mario levels
Enemies, 9/10: able to see enemies anywhere, and they are challenging
Replayability, 7/10: if you beat it, you will probably play it one more time, at least for me
Doomsday really speaks for itself though it can be extremely difficult (level 2 with all the spikes), though it is still possible because I beat it. If you are looking for a challenge, you should download this level set now!