God yeah... I can't get a perfect hit with any sort of hammer... it worked when I played the game for the first time though - it's really strange. 

All in all the game is awesome - I can't stop playing and I love collecting the shiny stickers Did you notice the reflections on the stickers change depending on how you hold your system? Really cool use of the gyroscope there! But there's some mindfuck puzzles that don't make sense or require you to find an hidden item without giving you a clue where to look for it. I couldn't wake up that Wiggler with a Radio or a Jackhammer but a trumpet did the job? Seriously? 

By the way I won one of the sticker albums! Yeah

I still don't know what to do with that Yoshi Sphinx.  I see two places I can't get to within it and I don't know how to get to the tongue.  I'll get to it once I finish up the Ice world.

I had the same problem.  I could not find that one hidden Shy Guy in the landfill.  And the game doesn't tell you how to get past it... no hints whatsoever.  I tried the fan, to no avail.  Who would thought that you'd need to use either the goat or the radiator.  They should've really did a better job giving the player hints!

If you can't blow it, suck it.

For the tongue, you need to drop from above. So, keep going up up up.