There are a lot of things I wanted to add :). 3 hrs feel long at first but when it comes to making the game it feels very short! You are right though, I should have made it replayable. I just didn't have the time!
good luck to you too in game dev! i recently started learning godot (scratch was making me crazy!). i loved your defender rituals game too. honestly, its quite addictive!
It's not that good of a game (I made it in scratch haha) but it's something. I could add more features like levels with longer codes if I had more time.