This is pretty fun! My team ended up making up a tower defense for the previous jam I was in, so it's nice to see another one in this jam haha. Art and music are both kinda chill in a pretty nice way, which creates this really cool vibe to play with. I thought the game was a bit too easy, since the first five waves only produced one-to-two enemies, until the sixth suddenly sent in 10+ and had me scrambling to make more turrets.
I do like that there are special enemies. My previous team struggled to put in a boss character, so it's nice to see that you have non-normal enemies to mix things up a bit more.
The procedural maps are also VEEERY cool. Procedural pathfinding can be a huge pain in my experience, so it's pretty cool that you not only have procedural paths that enemies correctly follow, but also procedural tower slots that are never out of range. It also makes me pay attention to the map more, since some towers are definitely in better spots than others and deserve more upgrades. It makes things surprisingly tactical.
Honestly, if you forced the game to regenerate maps every five waves, I think this game would benefit a lot. I ended up just relaxing on a single map at first, which was okay, but the moment when the game became really fun was when I started pressing R. Because it's left up to players, some might choose to stay on their map or forget regenerating is an option altogether.
Whereas if, every five maps, you regenerated (and refunded players for towers / upgrades), it would keep the game dynamic and allow it to continue scaling up its difficulty curve. If you limited that refund to a maximum amount or some percentage (50-75%), it would even make players hesitate more about spending money and make the game all the more tactical.
I'd recommend also adding a few more tower types, maybe ones that are a bit more situational. Like an AOE tower for when enemies are grouped together. Or a missile tower for taking down high-health enemies. Or a utility tower that slows speedy enemies. Maybe even a laser tower that never misses. Could add more dynamics to gameplay.
All said, this is a pretty fun experience. Well done!