Professor Fizzwizzle

This nice looking puzzler has won both awards and acclaim, and it's really good casual gaming. The one featured here is the slim, online one. There is a multi-level one available for download as well - works with both Windows and Mac - with 230 levels. (The one that won the Casual Game of the Year 2005-award). Starts out simple enough with you having to get the professor from your starting point to the exit tube - but it gets trickier by each level. Damn, that ice is slippery!