Such a creative concept! I was thinking about something involving while loops at the beginning of the jam, and this concept is improved to such a great mechanic by your game!
First up: I really loved the visuals and the feedback overall. The game feels extremely well polished and the effects & post processing is just amazing. I really loved the camera effects.
I really liked the while loop concept and it played out really nicely. However, on some towers, the while loop feels a bit unimportant. I think the tesla shock tower is a good example for future towers rules because the balance of the power ups and the shots matters a bit more---that means I have more control by using the loop.
Great job!