Here is another one - Nazofuri. Here is the page:
There is a detailed background story in the site, but due to my limited level of Japanese I can't make much sense of it.
However, at least I'm pretty sure I got the rules right:
Translator of the rules wrote:
You have this tetris-like grid containing bricks of four different colours (red, yellow, green, blue).
Clicking on a group of 2 or more connected bricks of the same colour can blow them up, and the bricks directly above will fall downwards.
The region of cells where the bricks are blown up will be "active" for about 5-10 seconds. All bricks falling into those cells will be flashing during that time.
If the player click on those flashing bricks to blow them up, it will be "chained" with the previous move.
This chained-combo can go on and on as long as there are flashing bricks available to be blown up.
The object of the game is to clear all the bricks in the grid and finish with a combo of a specified number of chains, which is shown on the "NORMA" box.
There are a total of 10 stages.
Here is an example, stage 1:
You have to finish with a 4-chain-combo. This is the solution:
Stages 2-4 are more difficult but not impossible to solve. But stage 5 is an absolute beast!