Good hack. Well designed. I'd love to see this idea built out to a fuller hack. As long as you add in plenty of saving points, you can design this for people to be able to play for 30 minutes at a time, which seems to be your target, and sometimes that's what I'm looking for. Levels are fun, and I liked three concept behind three story. Definitely a good first hack, and I'd love to see your next work.
nice simple designed mario hack that keeps it simple yet fun. well devoloped due to no bugs and a great vanilla hack to sink about 30 minutes of downtime. 5/5 for sure, great first hack with tons of fun levels. good luck on future hacks.
I usually don't play vanilla hacks because they're often boring or uninteresting, but I genuinely enjoyed this hack. It doesn't overstay it's welcome and it's fun to play. I like how you sometimes used darker palettes for parts of the foreground to spice things up and I like the secret exit in the cave stage. Really creative. The overworld is very pleasant to look at as well.
I do have a couple criticisms of this hack, but they're very minor and they don't strongly affect the gameplay in any way.
Perhaps this is just me being an idiot, but the second pipe confused me. I thought there may have been a secret area and you come out of the second pipe but it's just there for decoration it seems.
Personally I would delete this message box. Secret exits are supposed to be secret after all.
Was there supposed to be an Urchin in this section? Because if so, it didn't spawn.
Maybe turn priority off on the darker foreground tiles. That way nothing surprises you because it hides behind the foreground.
Beyond that this is a great first hack and I hope you continue to create more work in the future!