Fun puzzle game. The real challenge started around Level 12. Wish it started a bit early. Level 16 is great and every level after that is fun.
Can add a theme to the game like the arrows being people dancing with their hand movements facing the direction in which they can move. And, the ESC box can be the pub entrance. So the objective is to send all the drunk dancers to the club. Just some stylized game like Friday Night Funking.
The minimalistic art suits the game very well too. Just throwing some ideas I've got. Phenomenal job managing to do all this in just 6 hours.
Would love to see it expanded with more mechanics.