Played for a few more hours and prestiged. Some more thoughts:
Monsters spawn offscreen at top and bottom it's kind of annoying. Sometimes you can get unlucky and a boss will spawn almost directly next to your wall.
Events are boring also merchants should probably be free. Every time I get a merchant event I have no gold because of my commander. Or maybe some kind of upgrade to automate them?
The screen flash on taking damage happens way too often. The later waves you will have a hundred monsters attacking your wall at one time and the flashes are crazy annoying to look at.
The prestige for Scholar's mind is absolutely broken and unfun. You kill one monster and reset for 4 rp. Honestly prestiging in general should be more powerful. It's a grind to get to the later waves for little to no power.
Also maybe skills shouldn't cost gold I don't know.
Overall it's a fun game though. I think the prestige is just too grindy and redoing everything is not very fun a second time.