Portal: Ghost Adventures is a puzzle-like platformer game, where player can use portals and various other items to beat all the levels. It was developed by a single person for the Engineer's Thesis purpose. Game core mechanics were inspired by original Portal game from Valve. 

Player can find 4 different types of buffs, 2 different gravity zones, cube spawners and more. Additionally, ghost character, as well as portals, can be colored in many different ways. 

Currently the game has 5 levels, each having two difficulty options.