Spark: No idea how to contact you, so we thought to contact you here. Game is great. Hope for more replayability and what not. Maybe some coop/versus? (Lofty ask)
The real reason it wanted to get in touch with you is that there is an exploit in the Wave Defense Mode. If you stack turrets on top of each other, they will eventually disassemble upon impact. This is an easy exploitable way to get infinite ammo drops, something that initially costs 5k. 
Thanks for letting me know. I made it so that if there is another turret near the landing site, it gets destroyed when the new one is called. Great find. This was a pretty wacky bug. I almost feel sorry for patching it out. If you need to contact me, itch.io works fine. Or if you want to, you can join the Gearbits discord. Active links to that are currently in the wave mode announcement on Steam.