Stowaway is a word game about words hiding in plain sight. Read "Thor sent a note" and you might miss the HORSE tucked across the gap. "The maze brambles" has a ZEBRA in it.
Every sentence has a theme and a few stowaways. Drag across one to catch it, and the boxes at the top fill in. Find them all and the sentence sails on. If you're stuck, a hint shows where a word starts.