Sorry, I can't share my project because the assets of mario belong to nintendo. However, you can download the original code made by MGウッディー.
KEY: 1EKEDV3E
-Build stage
-Play stage
-Options
-Buttons config.
-Frame Skip
-Name
-Credits
-Back
-Quit
Also, if you have a lot of stages then you can play the challenge mode. This let you play random stages.
You need to change the file jumpdx_sp.grp. Then, the changes will appear on the game.
To change the size of the sprites you must modify the code but I'll not explain that because it's too complex.