Solution

The large grid can be divided into nine smaller 3×3 grids. Ignoring the background colors for now, we get 9 Mystic Square modules. In the manual for Mystic Square, there is a table that allows you to determine a target constellation for solving the module. Finding each Mystic Square's constellation provides spaces which can then be applied to the background of each grid.

The background resembles Lights Out. "Clicking" each of the marked spaces provides a new set of lit up spaces.

The new lights fit different Minecraft tools and armor crafting recipes, which is hinted by the appearance of the smaller grid at the bottom.

Given grid	Mystic Square + Rule	New Grid	Crafting Table	Item (Index)
7 2 3 4 8 5 6 1	1 2 3 X 4 X X X X else ... C1>			HelMet (4)
2 4 5 6 8 1 3 7	X 1 X 3 X 2 X 4 X R2> ... C2>			BOots (2)
1 2 8 5 3 4 6 7	X X 1 X 2 X 3 X X R3> ... else			SheaRs (5)
7 6 4 2 5 8 3 1	1 X 2 X X X 4 X 3 R1> ... C1>			LeggingS (8)
1 8 3 5 7 6 2 4	1 X X 2 4 X 3 X X else ... C2>			AxE (3)
3 5 4 7 2 8 6 1	X 1 X 4 X 2 X 3 X R2> ... C1>			PiCkaxe (3)
2 1 7 5 3 4 8 6	3 X X X 2 X X X 1 R3> ... C3>			HOe (2)
7 8 4 1 5 6 2 3	1 X 2 X X X 3 X 4 R1> ... C2>			Fishing RoD (10)
6 1 7 3 2 5 4 8	1 X X X 2 X X X 3 R3> ... C1>			ChEstplate (3)

The numbers at the bottom correspond to the larger table, providing an index into the crafted item's name. The extracted letters give the solution.

MORSE CODE