Meeeh...

The blocks are way too distracting....And look absolutely horrible, and are way too small. You also have a big white line on the left and at the top where the background is meant to be...but isn't. You also have WAAAAY too many ranks there. Probably start with 3/4 of them, then every few 100 points add one in till there are 6/7. Then make the re spawn time go faster and faster.

The 2X score bar was a good idea...Until it went behind a full row. Then you don't know which it's on unless you only have one full row. Should probably add that the the front of the rows.

Yawn.

There were WAY too many symbols, which meant the only way of scoring a decent amount was by randomly clicking everywhere...and that's not my idea of fun.
Also, the game loaded very slowly and took too long to start.

Theres potential

It took about 3 waves before I could even see the icon start to come in. I suggest making it where there's some stacks on the screen when the game begins. Otherwise, the game is very slow. Some music would also be nice if possible, since it seems like your game is pretty small, you should have room to add a tune into it.