This is insanely good for a game jam! Congratulation on your submission ^^
The game is so catchy I've been playing it for a hour now hahahaha, the only thing that I think of is maybe more powerups? For example, instead of having 1 radius, you have a mirror sphere but you have /2 of your initial radius. Maybe some horizontal evaporators. Other than that, more water droplet types? Some with more health, or in angle instead of vertical. So many opportunities :P do you plan on continuing it?