A charming little game, very cool music, but a little buggy!
Sometimes it just... stops, for no clear reason. Like, I'm lined up in the gap, and the red plans fly most of the way by and then... the games is over. (To be clear, that's without me trying to move, I didn't crash in to them part-way, I'm still lined up with the gap.)
Also, when I first load it, it won't let me move up (either with the keyboard, or clicking the up button)? When I move down for the first time after loading it, that teleports me to the top of the screen, and "unlocks" upward movement. That happens each time I refresh the page and load the game again, and each time the bug remains across until I move down. Even if I die first, on the next play I still can't move up (until I've hit down the first time, then the bug is fixed until the next time I load the game.)
Anyway: hi score, 1363 :)