Space .... Simulation

Howdy and G'day everyone , As the title says it , i want to simulate the space effect ( no gravity ) and more precisely , i want to make a cube float in space and

This would be hard to do in 2D depending on the context, but:

*For floating objects, use shading/shadow affects on their sprites to make them appear to be floating. Simulate floating with random movement if you like.

Btw, is this an isometric game like Zelda or Final Fantasy or a sidescroller like Sonic or Mario?

Idk if this will help you, but I use this behavior for one of my space games.

scirra.com/forum/behavior-spaceship-movement-behavior_topic44038.html