The design is alright, I don't complain about it too much. Maybe the kind of design may be a bit repetitive at a ceratin point, but the levels are kind of short, so it's not a big problem. Not much to say, except for the level "spring terrains 4", where the exit can be kind of unfair to get. Not sure though, since I somehow managed to nail it at first try.
Aesthetic-wise, it's okay. SMB3's graphics here are used well. Maybe there is some cutoff when pipes and small pipes are used, but nothing eye-searing thankfully.
- Slowdown in the water part;
- Tile limits issues in the castle level, which isn't supposed to be played, but you can still enter;
- Speaking of the first castle, if you enter you're forced to die, since it won't continue. It's a kind of unprofessional way to end an hack if you ask me. I'd have put the side exits enabled atleast...
Overall, a decent, very short hack. For those who want to play an easy hack for 10 minutes or so, this is the demo for you.