Got it! Thanks for a feedback.
Original idea was gameplay closer to classic tap away games (where before you can remove the block all the blocks in front should be removed too otherwise you loose life) but accidently i made blocks facing same direction removable in one tap. There is something oddly satisfying in removing big chunks of the grid. So i decided to lean on this mechanic instead of tapping each block.
So, the game become less of a puzzle and more of a timekiller.