Hexic HD is a a highly addictive game you'll be playing for a while
You advance to different stages only by completing the number of combos they tell you to do. Along the way they will drop bombs, these bombs have timers on them indicating how many turns you have left before it blows up. The only way you could defuse them is by matching them with the same color clusters. The game has 3 mode you could select from, Marathon, Survival, and Time.
In Marathon you try to last as long as you can. In Survival you have to make combos with the amount of clusters they give you, one you complete a level the clusters you didn’t combine will stay in play but you can't move these piece around. In Time mode you have to make combos fast since the time reduces every second. You could gain time by making combos but if your not fast enough its game over. There are several achievement to add to your gamer card, like beating Survival, making a lot of clusters combos and Reaching the 1,000,000 make just to name a few.
In conclusion Hexic Hd is very addictive game, you’ll be playing for a while. This game is free so try it out, I highly recommend it.