Moving Blocks

Hi

I�m trying to make this kind of game:

es.fupa.com/play/Puzzles-free-games/unblock.html

I still don�t know too much about construct2 but i have been reading the manual and the forum so i make this little capx with only two blocks for testing and learning:

dropbox.com/s/736q5uik8qpdmi9/blocker.capx

The movement its not smooth. In one movement i can�t leave the block in the starting position for exmaple, always there is a difference.

Someone knows a better way?

Thank you very much