Layout changes. There are changes to all of the layouts from the original Sonic the Hedgehog game. Some of these might be minor, but others are completely new. As the project is in progress, it’s difficult to summarise a percentage of completion. However, my intention is to have all of them fully changed at some point.
New art. This is something I’ve been trying to implement, and I have managed to implement some new art for 5 of the 6 zones (Sorry, Labyrinth Zone). Again, as it’s in progress, this is subject to change in the future.
New code. Some of the existing code has been fixed, changes and additions have been made, and many minor adjustments to better suit my style of development.