This one was p good, I admire the intention of people preserving or remaking flash games so they don't get lost on the sands of time.
By merit alone the gameplay is very good and I found it entertaining and the spritework being quite smooth, I never played the og one but if this was a flash game once then I'd say it is indeed impressive they put this much effort on it and the level design is decent.
I only give it a good score tho, because it doesn't have much substance since it's only platforming, but there were some unique levels like the tetris one or the bowser castle, if I had the fire flower or maybe boss fights would be fun. I guess this is only being loyal to the source material but probably going beyond would make the game even better.
On the technical aspect, there's the fact the controller doesn't work well, so I was forced to use keyboard, pressing jump on the controller didn't work, didn't make me jump higher, so I had to actually use my keyboard to complete the game, also IIRC the crouch in the controller didn't work either.
As it stands now tho, it is a really good game, good job.