This is a really nice game jam game! I like the artstyle and gameplay (even though I'm quite bad and can't defend multiple towers at once 😅 in the second? level). The GDD is also very thorough and one can see you put a lot of effort in it. The "helping" mechanics, where after one tower falls the rest become stronger is also a very nice and welcome addition.
You've been also been working on this Game continuosly - as seen on the Development Schedule, you organized yourselves well! I also really like that you have made the repository openly available, as it will help newer gamedevs learn how to do certain mechanics present in your game.😁
Overall, your team should be proud of this result - it is an awesome experience!