A fun, short game! I don't know if it only happened to me, but I didn't get the bonus 45 seconds. A bit hard. But it is a great idea and has good music.
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Good feedback ! I'm hoping to update it post-jam, to adjust the difficulty (make it easier!), and add some missing sounds.
You should get the bonus at 500 points (but not if the bonus score at the end puts you over) - also I will probably add you can re-win that every 500 points scored during normal gameplay.