Ok wow... so first off, space is bigger in most places, or small and curving in on itself in some, it took a little time to get used to but the non-euclidean space gimmick is pretty awesome and well implemented, its uniquely mind bending!

On the gameplay side things can be a bit basic, the controls are okay but its at times not obvious how some quests exploit the non-euclidean space, and it can be tedious to figure out what you have to do.

Don't expect too much from the story, it is slow in the beginning and simplistic BUT it picks up in an awesome direction at the end (also regarding gameplay and graphics).

-- edit --
just had to add this thought; i think hyperbolica is the most accesible implementation so far, of a game set in curved spaces

Ok wow... so first off, space is bigger in most places, or small and curving in on itself in some, it took a little time to get used to but the non-euclidean space gimmick is pretty awesome and well implemented, its uniquely mind bending! On the gameplay side things can be a bit basic, the controls are okay but its at times not obvious how some quests exploit the non-euclidean space, and it can be tedious to figure out what you have to do. Don't expect too much from the story, it is slow in the beginning and simplistic BUT it picks up in an awesome direction at the end (also regarding gameplay and graphics). -- edit -- just had to add this thought; i think hyperbolica is the most accesible implementation so far, of a game set in curved spaces