It's so small that it looked like it should be played full-screen, but the text was not readable in full-screen, so I had no idea what it was supposed to say (i.e., my health, airship health). I used my special first because I forgot which button it was, and then used my normal attack once, and the airship disappeared, and the game never ended.
Trying again with it at mini size, I could read the text. Some of the animation timings were a little disorienting (they 'linger' a little after you've stopped doing what is being animated), but at least the enemy didn't disappear. Though, the special didn't do a whole lot. Maybe it does more damage if you have a higher score? Anyway, it was cute.