UpBot Goes Up

The premise of UpBot Goes Up is simple: the player needs to guide blocks of up to four colours into the positions of the corresponding colour. The problem is that each block can only move in one direction (e.g. the yellow blocks move up and the blue ones left) and all blocks of the same colour (if more than one is present in the puzzle in question) move simultaneously. Of course the levels can't be just solved by moving the blocks forward; they need to move each other around, e.g. to move a non-...