Thank you! We might add some direction indications in the future! Some players have mentioned the same issue before, getting to those dead ends and then pretty much running out of oxygen. If we'll continue this project in the future (as our team's motivation is quite high!) we might add those to make the player capable of telling where should they go. Thank you for your feedback! :D
The choice of colours was actually based upon some memories I've had playing a certain videogame. Generally I really enjoy using shades of blue especially with black or it's more saturated variations. :)