Hi kerneliron! Thanks for playing, I'm happy you think it's a really good tower defense game! (This is actually the first TD game I've made!)
Thanks for your suggestion in resetting tower colours - I would have loved to implement this but I didn't to keep the game more tailored to the jam's limitation! - And yes, the game is indeed endless! After round 20 each round the enemies will get faster and grow in number! 😄