After Bowser's retirement, Princess Peach went missing (once again). So Mario has decided to go to Bowser's (abandoned) castle on a small island not very far off the coast of the Mushroom Kingdom to investigate. fixme: some musics have a loud noise at the beginning on accurate emulators.
The design is really confusing at first. The first two levels, in particular (actually the second mainly), were really weird. After the second one, the hack kind of gets a little bit better, but it has still one of the most common flaws in design, which is the repetitivity. It's like a level has the same section repeated many and many times. The pokey level is a bright example, you do nothing but go right while doing pokeys vore with Yoshi. Not a fun design overall.
The aesthetics are good enough. The author uses only vanilla elements here, with the exception of the font which is a custom one. Not much more to say, it was okay I guess.
As only issue worth of mention, some musics (one in particular) makes a loud noise at the beginning on accurate emulators. This was one hell of a jumpscare.