Charming PlayStation Vita puzzler Escape Plan will be expanded with a new set of levels in an upcoming DLC pack.

Named Bakuki's Lair, the free download will be included with Escape Plan's 1.01 patch, due 10th April.

Included are 19 new puzzle rooms, beginning in a sausage factory. The fresh courses act as a prequel to the main game.

The patch also includes "tweaks and improvements based on player feedback" and "pin-point accuracy on tap blocks", Escape Plan developer Chris Millar wrote on the EU PlayStation Blog.

Several more updates are planned. "We are also laying the foundation for a lot of exciting updates for Lil and Laarg in the future," Millar revealed.

Fresh screenshots of the new levels lie below.