Concept "Lock In!"
Well, it came down to a choice between an epic goldfish battler and a city building puzzler. I went for the city builder, but part of me will always regret not building a boss battle against a beta fish...
I'm relatively happy with my concept, but I've never built a spatial puzzle like this before, so that should be interesting. Hopefully it turns out fun. It's worth a try at least.
Now, to sleep on my design decisions and wake up tomorrow with a great idea how to implement this concept.
Good night everyone.