Thank you, I'm glad you like the art style! We wanted to make the controls somewhat unintuitive, to mimic the feeling of sitting down at a complicated air traffic controller desk on your first day, but I think we didn't progress the game in a way that gave the player enough time to learn each of the mechanics before things get too hectic!
And thank you for the feedback on the arrows at the top left! We definitely made it a bit too ambiguous, but the arrows indicate that the light next to it is an 'Invert Light,' meaning that when that light turns a certain color, all planes of that color have their controls reversed. We were trying to find a good balance of ambiguity that can be deciphered as the game progresses, but it seems that the planes ramp up in difficulty a bit too quickly to ever give the player a chance to learn some of the mechanics. We might include some reworks to the overall pacing of the game in our post-jam patch!