I haven't played the level, but by the images I can tell that this level's pretty fun despite the decor. Good-job man.
Creative level, it's not often you see factories made through the use of Vanilla GFX. I must say I was a bit disappointed that there were so few Bullet Bill Blasters in a stage called "Fun Gun Factory", it was still good.
Not too many issues, really.
Oh, so it just hurts, right?
Oh, no, no, no! It outright kills you!
(Though I guess you might as well be dead if your face were to congeal, I guess maybe I didn't think that all the way through XD)
This is a peculiar spot. Depending on when the moving block and the Ball'n Chain spawn, I could end up with a setup like this that makes it very difficult to gather the contents of these blocks.
Now, onto the "Hard Mode". It was actually pretty well designed, save for one spot...
This spot screams Big Mario Discrimination. Maybe I somehow threw off the timing of these spikes, but I could not get past this big without taking a hit.