You have some nice polish and visual/audio feedback. The concept is interesting, but the way that it plays out is basically just that the towers have a cooldown. Some more tower combinations like a freezing tower might have added some depth to the strategy.
Viewing post in GMTK2025 - Spark Towers jam comments
The freezing tower is a great idea. I was trying to come up with more during the jam, but nothing interesting enough to be a separate tower came to mind in time for me to implement. I think the idea for reshaping the loop I mentioned in the game page would help with the reflavored cooldown problem, but I ran into trouble with it and ran out of time.
Thanks for checking out my game. I had a good time trying yours.