WORLD: 1
LEVEL: Reclaimed Refinery
AUTHOR: notgoodwithusernames
This is the first castle in the hack, and it's unique in that it has two distinct paths you can take. One leads to the boss (and subsequently world 2), whereas the other leads to a "secret" exit and world 3.
At the very start of the level, it's apparent you can go both ways. One minor (graphical) nitpick is that the shadow of the pipe on the right is upside down.
What I like about the level is that there are a bunch of little turn blocks like this that are floating around and slightly challenging to get. Some have 1-UPs, some have powerups. They're risky, but not mandatory to progress.
This is kind of a sloppy position for a multi-coin block. I might expect this sort of positioning in a later world, but not this early on.
This level has a midpoint on both the left and the right path, which is nice. You can actually get to here in like, 30 seconds tops if you're going fast.
The ball'n'chain there is actually blind. If you're coming from below, the camera scrolls up and you have very little time to react. It might be worth redesigning this part to either a) totally remove the ball'n'chain, or b) modify the slope.
Excessive sprite usage for world 1. You have two ball'n'chain sprites, a jumping fireball, and a Grinder ready to ambush you.
This part is totally unfair. What happens here is that you come from the left and jump on the snake block, which causes the one on the right to start eating the blocks as well. If you're not fast enough, you won't be able to reach the SMWC coin. This wouldn't be a big deal if you could actually see that you need to be quick from the start of the snake platform, but the player will have no idea on their first run-through.
OVERALL: This is a well-designed level at its core, but it suffers from unnecessary sprite spam in certain parts (mostly at those involving the SMWC coins). With a bit of toning down, this level will be just fine.