Sobics School, a Korean educational company (as nearly as I can tell), offers a couple of very addictive Flash games which are similar in some respects to Super Collapse -- clicking on groups of blocks to make them disappear. Both feature very cute 3D characters that make baby noises. I spent more time than I care to admit playing Game 02, which is a bit more fun than Game 01. You'll find links to the two games here, and the menu for the "Fun" section of the website here.

Via Mister Snitch, who says Game 02 "may be the most addictive game ever."

If you prefer your Flash games in English, try Big Idea's collection.