What a cool idea! I liked that you have to keep in mind to leave space for relocating your light while placing your towers.
Would be cool if you can make the enemies and projectiles have all the same shade like the tower's shadows, making it look like you are fighting invisible creatures by observing their shadows.
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Thank you! Yeah, I was originally thinking of letting people remove towers, but when I was testing some stuff early on it seemed more interesting to make them permanent so you'd have to think about leaving space for the light too. And yeah--plenty of room to explore for visuals with this game, and even gameplay-wise having more mechanics based on casting shadows could be super interesting!