High FiveG 10

This is much easier to achieve with a touchscreen, but not impossible without one (just very difficult).

TOUCHSCREEN: Enter dash mode, use 6-10 fingers, and frantically tap all over the screen as quickly as you can. Most puzzles will only take 6-10 seconds using this method. Some can be finished in as little as 2-3 seconds, while some may take 20 or more depending on how the tiles are arranged, but on average, you will gain time on every puzzle using this method. Once you receive a gem mode tile, you will be finishing off puzzles in as little as 1-2 seconds. Anything other than very bad luck will result in finishing this achievement in 2-3 tries.

MOUSE: If you are attempting this achievement with a mouse, Godspeed. Special tiles will be your savior, and each requires its own strategy to give you the best chance of passing the 5 minute mark. Consider saving this achievement for last, as you'll need to be a Taptiles expert to pull this off.

Gem mode tiles: save these to be the last match you make on the board. This will give you the maximum number of gems on your next puzzle, and therefore the greatest number of wilds possible. This means you can furiously click in a tight cluster and make matches very quickly. The earlier into a puzzle you start gem mode, the more damage you can do to a puzzle before it runs out. This is why you save it for last, as it will not even start until the beginning of the next round.

Extra time tiles: Match these as quickly as possible for obvious reasons. Drop everything you are doing, every strategy you're employing, and do whatever you have to do to make these matches as quickly as possible.

Wild tiles: These tiles are situation-dependent. If you receive wild tiles early in a puzzle, use them, because they will result in the greatest number of tiles cleared. If it is later in the puzzle, save them to be your last match, because they will be activated at the beginning of your next puzzle, which again will eliminate the greatest number of tiles.

Gem/Wild combo: When you activate gem mode, every tile will match with every other tile, so it's very common to receive another special tile while still in gem mode. If this tile is a Wild tile, you have to assess the situation. Wild tiles activated while IN gem mode will clear the entire puzzle. If Wild tiles are activated in gem mode as the last match of a particular puzzle, the entire next puzzle is eliminated without a single second ticking away, giving you a free 15 second bonus. If your gem mode will last long enough where you can finish your current puzzle and activate the Wild tiles as the last match, do that. But if you think gem mode will end before finishing your current puzzle, use the Wild immediately to clear out the current puzzle.