Gotbletu @ Youtube have done a really nice review of puzzle game Hex-a-Hop, a gem already available in Ubuntu repositories. I was really tempted to try this game after watching the video and found myself really hooked to the game later.
Check out the Video Review
The version available in software center is not the latest one and also sound and music effects are not there. You can download the latest updated version with cool sound effects and music from here
Many Thanks to Gotbletu