First mention of turret!!! Thanks for that! I initially wanted to make it just a maximum of just 2 spawns. To give the player a temporary escape incase they very suddenly overwhelmed. But I wanted to add one modifier that was overpowered in case the player was not able to complete despite many tries and also to reward experimentation. So I added the regeneration mechanic that was there in mines, to this one too.
And yeah games like this require a lot of playtesting and tuning for a good experience. So probably wasn't the best idea for a game jam. And thanks for the idea to change the buy amount too, a brand new and great suggestion! Glad you enjoyed!