Fun little puzzle. The fourth level was the most devious to me. Stumped me for a couple minutes. Was counter intuitive to what I felt I should be doing to solve it. Got to the end eventually though.
how long did it take you?
Level 4 took me about 6 or 7 minutes. The others generally one or two. 4 really stumped me for a moment.
i found myself pushing boxes into corners that didnt need it so ended up adding more pressure plates to those corners