KrissX, Puzzle game by Konami.

Fancy a bit of brain training on the quick? KrissX is a word based puzzle game against the clock.

The aim is to complete the puzzle your presented with as quick as possible by clicking on one letter to swap them over and complete the word. Keep an eye on the clock, when your time reaches 0 it's game over. The first few levels are easy but things get a bit frantic around level 5!