Box Life is a unity 3D game from Tequibo in which your goal is to collect secrets, abilities and escape. It's a first person metroidvania where you start off with less abilities - you can't even jump at first but as you discover areas in the box world you will find items that will give you the abilities that you need in order to go to other areas.
This game features a full 3D environment although there is not much there to see but polygons and cubes. There are a total of 6 secrets to be found in this game and all you have to do is look harder. It becomes a little difficult when you start to get dizzy but it's still great little game. Meanwhile, here is
Box Life walkthrough and secrets guide.