I like the low-poly/simple 3D aesthetic showcased here. It gives a unique and relaxing atmosphere. It is a bit plain, so I do think you should have added slight textures over the colors.
However, I suggest that you take a focus of clarity in your future projects. The controls were a bit confusing, and I think you should have added a reticle and instructions/tutorial. It was also a bit buggy and laggy, although I don't think you're to blame. Everything else is pretty good.
Great Job! Keep it up!