Hexic HD is a lot like Bejeweled with a few key differences. The gameplay gets repetitive throughout its 3 modes.
My favorite is the Marathon game type. There is no end until you make it three black pears, and put them together. The game can potentially go on forever, but diffusing the bombs can sometimes be tricky. If not diffused, when the bomb counts down to zero, it's game over.
The game starts off slow in the first few levels of Marathon mode, introducing you to new things slowly as your level progresses. The only problem is it doesn't tell you how to win until the last level. By then it's too late and very hard to get flowers. It's easiest to get flowers in the beginning levels where there are only a few colors.
For most people, Hexic HD will come free on the hard drive, if not it might be worth the purchase to play it for the afternoon. It is certainly a must buy for any casual gamer and for anyone who likes puzzle games.