Thanks for playing. The turret upgrades actually make a significant difference from wave 6 onwards and I'm not sure how far you could actually get without them. Different turrets would be great, so would different enemies, and more UI, but it's a 7 day Jam so tried to focus on creating once cohesive enjoyable experience. Hope you had some fun and I'll be sure to check out your game.
Viewing post in The Long Night jam comments
I finished it and had a wall of turrets on the top third of the screen, I just boosted the damage a ton in last half of the gam but I think the enemies health was increasing too so didn't seem to make much difference at that point. I did have fun and enjoy it I guess I just didnt get the power fantasy I thought I may have got when I was doing well :)