That's always been the goal of the Kirby games tho. Easy from a head on approach, but a bit of depth found in cool levels with secrets buried within.
Squeak Squad is easier than Amazing Mirror in that the level path isn't so fuckin obtuse. I think id have a much easier time with Amazing Mirror if there was some rhyme or reason beyond trial and error to getting to areas. Squeak Squad looks great, the ability to store forms is awesome, and the magician and ufo forms are OMG awesome. Twister is still the form to beat tho. Invincibility, flying around, and you only become vulnerable again between twisters for about a second. I beat the second to last boss using this and omg easy.
While its probably even easier than NSMB I had much more fun with this title since the level design was MUCH more clever and a lot of attention was put on making what form you used in what stage matter. Not only that but through secrets you collect special techniques for each form. Some techniques can also take on properties. Like electric kirby on a thunder cloud makes a bigger SHOCK but the cloud eventually vanishes from the move. Racer Kirby can take on the property of fire when hit with fire while in motion. It can also take on the property of electricity. Fire Kirby is used to light fuses running through a few levels to reveal secrets, the list goes on and on.
I will say its pretty fun collecting the special moves cause you can really find a costume you like the best. Tornado is just cheesy, but swordsman or ninja with the special moves = ftw.
So in short, NSMB is neat, but Kirby Squeak Squad offers more FUN. Go buy it lol.