Across: Word Puzzle Game by Victor Grachev

 Across: Word Puzzle Game comes from Victor Grachev. The objective is to connect the fragments to form words that fit together.

 The words are tied together along a central theme.

At first I thought this was too easy. It does get tricky.
https://itunes.apple.com/us/app/across-word-puzzle-game/id1456390145?mt=8