Aztec Stones

A big lack of the game is that you get penalized if the game laggs, even if you press a correct grouping of stones. that is so annoying

lost all progress. was a fun time killer while it lasted

The blocks take too much time to fall down, often wasting a few seconds when you manage to clear most of the bricks from the upper rows.
The lag is horrible. Either it's just our computers which are - sorry for this word - shitty, or it's the game which requires computers so strong that nearly no one has them; the reason being lack of $$$ to buy a computer strong enough to handle this game.
The good side though is that there is no energy in-game. I hate every game with that shit, no matter if it's a mobile game such as Pocket Mine, or even an MMO game earning 100$ every second the game is running.

I don't believe the player should be penalized for clicking gems that don't have any matches especially in a timed game...

It's annoying how long it takes for the stones to fall all the way down, and when it means you end up missing out on a larger group of stones.