I know this is an older game, but damn it, Mark! I have to agree with Nayolfa; level 6 was f*cking diabolical! I puzzled out the concept quickly enough, but it took me to 3-4 days to figure out how to set the damn thing up properly without wasting any blocks! Came THIS close to begging you for the answer (which i may end up having to do for level 6 of "Push n' Pull"). Rest of the game was pretty easy, making the last level even more frustrating.