Glitchspace is an abstract FPS where you progress through your environment by modifying attributes of red cubes using a visual programming language that costs $12.99.
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Pros
Pro Non stress environment
The music in game is similar to elevator music and the visuals are simple and relaxing, combined it creates an atmosphere that is pretty stress free, which is good as the further one gets the more complicated the game can become.
Pro Inventive 3D representation of programming
The player needs to get from point a to point b by fixing glitches in the environment by using a programming language called Null, which allows user manipulation of the environment. Through this manipulation the game focuses on an inventive way of showing 3D representations of the mechanics of programming.
Pro Helps you learn how 3D game geometry works
While the 3D programming language in the game doesn't have much scripting or logic in it, it does teach you about how 3D geometry works through concepts like scaling, translating, and transforming objects and vectors.
Cons
Con Intimidating to learn
Upon first boot it is quite obvious that the game will take a bit of play to learn, this is made worse by the fact that there is no tutorial. Though the game is in early access, so that may change.