what a cute little hack. usually i dont play easy rated hacks, but this one just looked so nice and got recommended to me so i gave it a go.
its a beautiful small hack (btw i saw the overworld ;) hope it will be done soon <3) very enjoyable.
and its WAAAAAAAALUIGI i mean cmon.
walljumps and straight fireballs are enabled and are a nice feature.
i love how a shade of waluigi + a button shows the controlls for for example the walljump. its so cute and cool, way better than just a textbox.
The story is short and simple, you play as Waluigi and each level has its own little gimmick here and there. What's not to like?
One thing you should look into though (as mentioned by Nimono earlier) are the donut blocks. If you jump off of them before they start falling they just dissapear completely, even though the level was still beatable, I'd look into it.