Fun game! Well polished for a game jam, really cool sounds and effects.
Unique take on the theme, which I always like to see. Very neat concept of timing the tower defense waves.
I'm sure it was just due to jam time considerations, but would have loved for more enemy and tower types so I would really have to be careful with which waves came at the tower at which time/direction to make sure I had the right towers in the right spots, which felt like the goal.
Super fun and impressive for 9 days, great job!