what a wonderful little puzzler! the intro was super endearing, of course. great job with that. this game has a wonderful intertwining of theme, art, music, and gameplay. they all harmonize with each other wonderfully, and the whole project feels really well thought out.
the arrows were nice for the first two levels! i don't see any harm in taking them away for future levels, but i will say that i (for the most part) just started the run to see where they'd go, rather than trying to figure it out in my head. not sure if there's a good way to curb that behavior, or if that's even something you're worried about.
this game is surprisingly intuitive, given that i've not played anything like it before. when the two didn't crash on a parallel line, my immediate reaction was "oh of course, they just ran past each other." it was fun to work out all the puzzles, and the romantic in me is thrilled to have sparked so many meetings :p great game! one of my favorites