I bumbled upon a pipe-themed level while playing 100 Mario Challenge, and decided I wanted to do one. Unfortunately I hit the warp pipe limit much earlier than I’d expected, so it’s only partially pipe-themed. Still, I’m pretty happy with it.
I keep trying to make levels that are easier, more interesting, and less linear, and I think this is the first time I really feel like I hit that mark. I only spent a few hours on it, too.