Making Rain: Formation

each row and column contains 1,2,3,4,and -

odd numbers (1 and 3) can not be vertically adjacent

even numbers (2 and 4) can not be horizontally adjacent

invalid values turn red

fill the grid to win

left click or press x to cycle the value

right click to reset the value of a tile

click middle mouse button or press z to undo

press r to restart

This game is based on my pen and paper puzzle game 'Conscious Faults 001'