Hi! That's for your math TD, thought it's better to put it here to avoid spoiling :)
(took some time to re-create it, though it was fun too :))
[had some troubles adding screenshots, so...]
For "Broken Countdown": x^2 -> log -> log -> +1 -> log -> +1 -> log -> x^2
(that's the order towers are applied to enemies, so the real order of towers should be reversed)
“Built to scale", pretty same idea :) log -> log -> log -> +1 -> log ->x^2 -> x^2
“We have to go back”: /2 -> /2 -> x^2 -> -1
Actually, i'm thinking about making some simple math games for fun (hope they'd be fun not for nerds only :)), so if you're somehow still in it, i'd be glad to talk about it :)