It’s nice to figure out the route you should take. What a difference it makes on how something is presented: Because you have chosen to do the input this way, it makes for a more trial-and-error based game than a puzzle, but then, that is where the fun lies in this particular instance.
Music is fitting.
The slight delay before the timer starts made it so that my first input was missed, that’s a little annoying.
(Lastly, I think I found a (couple of) bug(s): The game will stall (hard-lock) when you fill up beyond the number of directions you are allowed (exactly full is alright). You need to restart then to get it going again. Another one happens when you leave the arrows empty, although in this case, the opponent ants will first play out their marching orders, before it locks.)