Dude, my brain 
This obviously would depend on the solution, but rather than tapping the block moving one space, to save your sanity, could tapping the block auto-move it to as far in the other directing as possible? Like if you tap the dark blue one in your example, it moves all the way up because that’s as far as it can go. Then if you tapped the yellow one, it would stop when it hits the red one?
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