I loved handshakes, it also had me laughing so hard while playing it. The concept is so goofy and fun to play and I actually got stumped a few times. To me the best part if a puzzle fame is the "AHA!" moment and I felt that a few times when I finally figured out how to beat the level.
I have bot tried connect all bots yet.
If you havnt tried Shape Theory that game feels very polished and is quite challenging. I really liked that one too.