I tried creating a 100% save by using glitches (the bugs prevent from achieving it normally), and I succeeded. I was trying to import the save form BizHawk to Kega Fusion using the password save feature, when I saw that the password was incorrect! I concluded that there is a bug with the password werification system. Now I'm left with no choice but to make a video about it and send the un-working password.
Save password: 2 V G M G V L 8 N V /
EDIT: 22.11.2017 Version 0.2 just got released. I loaded the save state of the unworking password from 0.1. The game looked just a little corrupted, but it loaded successfully. When I entered the password I mentioned previously, I saw that's still incorrect. I then softreset the game and chose Continue. It started right through the intro and Green Grove Zone Act 1. After I got an Game Over, I got sent back to the main menu with Continue still selectable. The same happened when I first tried to load the save. And it just loops infintely... However, when I completed the stage, I'm sent to the world hub with the save from 0.1 still intact. And when that happens, I'm unable to replicate this bug with the same save file. The password changed, though, but it's still incorrect.
Save password: 2 V G Z G G L 8 B 9 /