Uuuhh, I seem to recall going up and down the stair-like bit a few times to get myself in the right aligment.

Just in case you get too frustrated, #29 is:

Ended up going for a walkthrough - was really annoying, but I had to know how it was done.

Finished the next four with far less effort, and so I've also completed it. (although I'm still frustrated about 28 :()

https://play.google.com/store/apps/details?id=com.soneraltincit.cubox

Check this out