Another generic hack? Cool. I'm a generic hack tester too. Here we go or something.
It's kind of bland to be honest. Just Mario standing in the middle of literally nowhere, although it has been recolored. Not great. Also, the screen with the plot (why did I forget the correct word) is completely unchanged except with the music being 'Here We Go!' instead of the right one. Could be because of custom music but i'm not too sure. If that is something you didn't think of, it's fine, but it would be handy to vary it up a little.
Vanilla Plains 1:
Did the jumping sound get changed or something? Pretty sure it did. It's not horrible but I prefer the original. The level itself is very well made, but maybe a bit too difficult for a first one. Some jumps are pretty awkward to do and the bonus zone is also overly hard. Finally, one of the Dragon Coins is really hard to obtain (the one right after the pipe that can be entered) because the hitbox is rather strange. For the rest I don't see any red flags and it was pretty fun to play.
YELLOW SWITCH PALACE:
The gimmick is fun, but it's also a bit too
short. It's fine that you don't want to overly reward the player but it feels unnatural. Maybe make less rows of coins or something like that. That'd work.
Vanilla Plains 2:
The design is once again very good, but there are quite a few small issues that might be handy to fix. Here is a list.
-The blue Beach Koopas can clip through the ground and pipes
-Got 4 lives for being small.
Thanks, but was it that neccesary?
-This is something that rarely happens, but I died by entering the wall after the note block pushed me in.
If you fix these things, you'll be all good.
Suprise suprise, the level is well designed once again. However, this one is marred by a consistent feeling of that it is unfinished and thus unpolished. Some examples:
-The clouds cut off at the top
which makes them look weird and ugly because of those black filler tiles.
-This icy pipe
makes zero sense. Why was it put there? It sure doesn't look like it fits in any way too.
-Is this some kind of tester message block?
All it does is remove those ugly clouds.
-The part after the midway point is a little too brief as well. Yes, there's that P Switch part, but getting the cape lets you fly over all of that. Didn't get one? Just enter the reset pipe and backtrack a little. Not really well thought out in my opinion.
And that concludes the demo. It surely isn't bad at all, the levels are pretty fun and does feel like an actual Mario game at some points, but there is a boatload of minor errors that remove said feeling as soon as it appeared. Just tinker with them a little and it has the potential to be neat.