Donkey Kong and Mario Bros. Engine Remake

[Ostrich101]

So a few days ago I was really wanting to make a remake of Donkey Kong and Mario Bros in a sorta bundle fangame, but after thinking about it for a bit, I thought that maybe I can make it into a engine for people to learn from and possible use to make their own Donkey Kong/Mario Bros. fangames.

While there have been a lot of main series Mario related engines, I haven't seen that many for the other games like the arcade ones, which is odd.

A user named Wes Copeland (former world record holder of Donkey Kong) attempted to make a remake of Donkey Kong's engine for use as a template, but he stopped progress on it 2 years ago, so I guess my engine will be filling it's place. (or not)

I want to mention that this isn't the first time I've done a remake of a Donkey Kong related thing. Last year I particepated in a Joke Game contest on the Mario Fan Games Galaxy, and my submission was a remix of Donkey Kong '94 (the game boy game). It's a bit buggy, but I'm (mostly) proud of how it turned out.
Video of someone playing it:

Anywho, here are some .GIFs of the engine:

(a small error with one of the barrels in this gif has been quickly fixed)

[Ohrami]

I've never played Mario Bros. but the Donkey Kong one needs a lot of work since it looks nothing like real gameplay

[Ostrich101]

I've never played Mario Bros. but the Donkey Kong one needs a lot of work since it looks nothing like real gameplay

Could you please elaborate on how exactly the Donkey Kong one is needing work?

[Kibbey93]

I've never played Mario Bros. but the Donkey Kong one needs a lot of work since it looks nothing like real gameplay

Could you please elaborate on how exactly the Donkey Kong one is needing work?

Initial observations. The jump animation is too fast; Jumpman climbing ladders is too slow and animations are off; and the barrels 'turning' onto a ladder and rolling down them is too slow.