Wow! That's very impressive. I had a hard enough time beating Harder difficulty with all the unlocks, and had to use lots of movement and occasional sells.
Definitely agree that the final screen should acknowledge these additional triumphs like not unlocking things, selling, or moving towers as an additional bonus!
Not building any towers after defeating Father sounds crazy hard! I assume you still were able to upgrade towers?
Upgrading towers after defeating Father would defeat the purpose of the challenge :) So you spend whatever money you have after Father is defeated, and after that to only move towers, but not to buy / upgrade them.
The idea there is to use clovers to clone EMP, and sell them, which gives you extra 3600 to spend.
Another question is whether it's intended that when the summoner is defeated, the game doesn't award money for the remaining spawns. This way, if I have say mostly Ice / Teslas by the time I fight the summoner, most of the spawns would die from the shards / lightning chain, and I'd end up with more money than if I mostly have stones, that kill the summoner before most of the final set of spawns. I made some experiments, and the difference in money made from the summoner wave can be as high as 100+ extra gold depending on how many spaws remain alive when the Summoner is killed.
Oh wow that's definitely not intended! That's a really great catch, will have to fix that in an update. The intent is definitely that at any given wave, you always have received a consistent amount of gold from all previous waves with no variation.
Also it's cool to see a playthrough that focuses so heavily on Ice towers, as I usually see them as the most underutilized tower.