I recently tried to continue an ambitious project.
It is a cocktail of various kinds of arcade games (especially Wonder boy III and Street Fighter II) oriented only from left to right in order to make it well playable.
I am trying to simulate a Capcom Play 1 system, in fact as background music I added the most beautiful techno-house songs from the period of its vigor (1988-1992), which I think is the most suitable kind of sound; the frame transitions typical of Capcom games, the graphic genre, etc.
Meanwhile, I tried to accumulate all the features of a 90's coin-op (credit mode, service mode with options, possibility to continue the game both in coin mode and in free play mode, region setting: Japan, USA and Europe...)
Obviously, when the project is completed (in at least a couple of years!), the sprites will all be modified, the ones I ripped from other arcade games, are temporary, to accommodate.
The character models will be more or less like this, always maintaining the graphic criterion of the Capcom Play 1 (I'm not good at drawing):
Also the sprites of the presentation I will change (I intend to clone Super Street Fighter II intro, but with the addition of the legs, which from the bottom goes upwards!)
Note: respecting the authors of the tutorials I inserted in the code, I put the names of these in the classic "credits screen" (when the match is complete):
For example, the second final boss (Dragon Cactus) is the centipede tutorial by Sebastian Janisz; insert name in the records ranking is the tutorial by Chris Burrows, the method to quantize and adapt the graphics is by Aloan Moreira, etc... etc ...
Still the progress of game development is just a "draft". I will still have a lot of work to make it an arcade perfect.
The example here