Loved the atmosphere and gamefeel! Was a little confused at the start but was able to get it quick, would have been nice to have the controls show up while in the specific mode instead of the main menu! Was only able to get to round 4 because the game blackscreened on me after that haha.
Also probably a good idea to not let the player build too low or high, it was confusing and i ended up building half my stuff underwater and too high in the sky in the first round :P
Other than that, really great game!