Yes, indeed. I started the original game in 2019. It was fine when I started, but the 2d backgrounds made it impossible for me to create the scenes I wanted, later on. Especially character interaction with the environment doesn't work with 2d backgrounds. Overall the remaster version is a much richer and advanced game then the original one is. Many new scenes, characters and other stuff have been added, as well as a signifacant improvement in quality, full 3d environments, advanced animations, better lighting and so on.
Here are a few comparisons:
https://f95zone.to/threads/alenjas-adventures-v0-21-final-wet-wild-production.26557/post-5245428
https://f95zone.to/threads/alenjas-adventures-v0-21-final-wet-wild-production.26557/post-7994345
https://f95zone.to/threads/alenjas-adventures-v0-21-final-wet-wild-production.26557/post-10243807
It's the final version of 0.21 and yes, we have caught up to the original game. But still, like I said above, the v0.21 Remaster is much MUCH richer in content then the original version was. Easily 40-50% more content was added. And that is without even counting the new content for the Premium Edition, because the PE content is on a whole other level as well.