An instant hotfix? Impressive and very welcome addition. You're doing God's work
Edit: After playing the game for a few hours, I wanted to ask, are the slime waves additive? As in does the game add more and more endlessly? Cause after 5 hours the game spawns like 40 slimes at the same time and it stars severely dropping frames cause it can't handle the number of slimes (and ofcourse makes the waves insanely difficult to do anything about them even with a whole horizontal land row of defences).
I had specifically made a base of 8 lazers and 2 max lvl ARC with multiple barriers and the sheer number of slimes took down this entire spawn trap base in a handful of seconds.
This definitely happens when I making spawn trap. Thus far I have not tried it to replaying it from the start. The only thing I have from scratch is the cave part which also had a ton of slimes which you stand no chance against since it spawns a ton of them all at once, but luckily after building a structure in the middle part they get stuck underneath trying to reach it forever.
I would say to fix the balance there are two ways of what I am thinking:
Either spawn a bunch of them but have them squishier to kill or have less of them at the health they currently are, but have them spawn 2-5 at a time not all of them at once, so it's like a constant wave for a good 20 or more seconds. Depending on the defences the waves start hard and get easier as the player advances and has better ways of dealing with them.