I am RetroYuuki, a content creator on YouTube who plays classic games, rom hacks, and other cool things. I just recorded a game play for your hack and I really like the demo. It's not too hard and just right for those starting to play Rom hacks. Im going to share my gameplay soon
The design is kind of poor. Yes, it's a world 1, but this doesn't justify the fact that there are very flat zones with ground enemies as your only obstacle. From experience I can tell that a world 1 can be very fun, even if not challengy at all. It's not the case here, every level I played has nothing but flat land and ground enemies.
Aesthetic-wise, it's good. I like how the hack keeps a vanilla-ish feel, yet uses some exgfx as background and foreground. I wish there were more decorations. The levels were flat already, using no decorations made them empty as well.