The graphics are cool and the sounds fit well, though it's hard to say much about the rest; if you intended it to be a sandbox, it would be cool to add digging and mesh deformation using marching cubes or boolean operations.
Thanks for the feedback, I have updated the game - you can use Q or E to deform terrain. I also did a bit of a visual touchup, should look better now though may take up more GPU. Let me know if you have more feedback!
