i tried it too PA. The way you have positioned targets makes it impossible indeed. Only way to do it is to rearrange the targets but this will change the layout. I apologize for being so insistent but I like the design very much and I wanna find ways to improve the play. It's ur call PA.
I have to say that the level's design is awesome. However, the play was a bit tedious. I suggest trying to leave less blocks ungrouped. Not sure if it is possible but if yes it will become more challenging.