Level 8: This one might take a couple of tries. Walk, don't jump, off the ledge and keep holding right. When you just get past the second lowest platform, make a boxman
Level 7: Make a crouching boxman at the right-most point of the backwards G platform. Go to the left-most point, and make a boxman that is going towards the crouching one. Get to the cube before the wall is closed.
 "Kongai"){kind=icon}
 "Use Boxmen"){kind=icon}