The design is fun enough: despite it being kinda linear-ish and traditional, it's fun and challengy. I honestly didn't like the idea of redoing the same level 4 times in order to find all the 4 exits of it, since it gets too repetitive at a certain point. I don't know what to say anymore about this.
Aesthteic-wise, it has been used vanilla palettes and gfx only. Not much to say here, the tile assembling doesn't seem to have produced any major cutoff or glitches.
As only issue I'd like to mention, probably the author submitted the wrong .ips (look the OW pic for example, the .ips has the original SMW overworld instead), and instead of 3 levels you actually only play 1.
Overall, short, but the design isn't bad. Pretty challengy, but not too much.