As others have mentioned, the durability of the towers is fresh take on the TD genre, unfortunately I could not tell which tower needed repairs and once you realize you just need several resource tower and repair them and the attack towers constantly the game was too easy and got boring.
Really like the different resources and durability aspect but need to find a good way to balance the micro management and entertainment - maybe units that run around and repair, upgraded towers do new things, new enemies.
To be clear I am not expected all the above in a jam thinking future, I completely understand the time constraints - always my main problem and your game is pretty good for a jam - thanks for submitting.