Neat fun little game! I don't really understand what makes a shape reachable, so I can only use trial and error to solve levels. Maybe make this a bit clearer! :)
Thanks! I will think of a better wording or visual aids. The idea is that there has to be a clear path between the pulsating shape and its destination pair. No other pairs or walls should be blocking the path. That is what makes the target reachable.