In the version 3.0.0 the interface was completely updated as well as navigation in the game and new simple design allows you to quickly navigate in the game!
In the screenshot attached below you may see how your Collection page looks now.
Now that the bottom bar has been removed, Tournaments, Jigsaw Puzzle feed, Puzzle Shop sections are located on one My Collection page and can easily be accessed.
In order to find your puzzle packs, please scroll Pack Selector to left or right.
Please note that Energy points have been moved to Jigsaw Puzzle feed section. They are no longer displayed on My Collection page.