transmute
How to play
The object of the game is to place tile on every grid of the game field. The tile can be placed only when all four adjusting tiles have same colour or value. The empty tiles and block tiles are matching any colour or value.
If whole column or row is filled with tiles they disappear. The empty fields after this operation have different colour then empty but not yet cleared fields. You can again place tiles on them if you wish. In the left bottom corner of the main game field current tile is presented. In the right bottom corner the trash is presented. When you want to discard current tile press trash field. In the trash there is place only for three tiles. Example: trash with two tiles inside 
. Each tile placed in the main field makes clears one tile from the trash. Clearing row or column in the main field clears whole trash at once. Sometimes the new tile is black and has X mark on it 
. You can use this tile to remove one, not needed tile from board. 
The grey tile without any symbol matches any colour and any symbol so it can be used in locations where there no any standard tile will fit.
Screenshots
