In wondertastic (1 or 2) the point of the game is to simply win by clicking the people or poru. In each level one poru is correct, all the rest are not. The correct one will proceed you to another level with more poru but still only one correct one.
In Wondertastic Two the order is different. Music plays in the background. Dancing Poru, and a monster named Naz. Also there is a twist with the music. At crucial points in the song music notes will appear to indicate that you can click on Naz to defeat him, or the right poru to get bonus points. You are also timed and at the end there is a boss.
Screenshots:

This one is a bit old. Things look slightly different now.
Progress: EDIT: Demo Out. Dont expect another demo. The next thing you will get is the final project in about a week or two.
Demo. Play now.