Frustrating

I love this puzzle app and I would give it a definite 5 star rating if the grid would stay locked while placing puzzle pieces together..... Ive only done two puzzles since I got this app before 2/14/2015
Also would love to share some of the puzzles I put together ....if these concerns are fixed especially the locking of the grid I would give it 5 stars I would hate to let this app go..

Crazy Sweet Starr about Jigsaw Puzzle - Brain Games