MatchRace app for iPhone and iPad

A classic matching number game with a twist.
The goal of the game is to match tiles with the same numbers. Tap a tile to reveal a number and tap the next tile to open the next number. If the numbers match then the tiles stay open and get points otherwise the tiles will close again and some points are deducted.
A level finishes when all matching numbers have been found.
The game starts of with 24 playable tiles. In the first level match 2 tiles with the same number. Subsequent levels are harder, level 2 requires 3 matching tiles with the same number and so on. Level 6 requires 12 matching tiles and when level 6 is completed the cycle begins again with two extra row of tiles.
Level 18 is the grand final level and to finish you need to match 16 tiles of the same number.
The challenge is to finish 18 levels of game in the shortest time with the highest score.