CheerfulChe's Comments

Hold Shift to put cross; hold Ctrl to move the grid with mouse; WASD to move the grid square by square; 1, 2, 3, etc. to choose cross and colors respectively

to shanus777: All of them are possible. You should just try harder, like in Brimstone Mine you have to jump from the very-very end of the platform and swing the pickaxe at the right moment. The same way with the scorpion target. Good luck!

those movable parts should be highlighted in some other, more distinct way, because they can hardly be distinguished from fixed ones