The Therapist Gamer

This is a 2D Vita game from the team that later made Guacamelee and Severed. You play as a blob that can absorb things and grow bigger. At the start of the game you are small enough to slide underneath a book, but towards the end you are absorbing skyscrapers. 

The game is pretty straightforward with a light, humorous style - often parodying other games. The game levels are the perfect length for on-the-go gaming, and there is decent replay value.