I'll have to reject the hack for the following reasons.
The main been is that is uses a Level from the original SMW been Yoshi Island 4. Don't submit hacks with levels from the original as you should only submit levels you have made yourself and are 100% different from the original.
Not only that but some of the edited levels feel just like edits which parts from original stages still remaining. Always delete and clear a level fully before making a new one as we don't allow edits either.
For the levels that are original they are way too short and easy with most been filled with long flat areas of ground with next to no challenge.
Lastly the hack is littered with cut-off in each level which brings down the presentation and makes it look quite sloppy. The hack needs a lot of work in order to be accepted so I recommended looking at our Top Rated Vanilla Hacks to get an idea of the standards we accept on SMWC.