I'm still working on it on a daily basis, but my progress aren't really obvious, because I'm thoroughly making each level load custom tilesets, have their own palettes, that kind of things.
A lot of difficulties come from the fact that the game has a lot of portraits, so you have to identify a point where you can tell it which level it is, otherwise it will always show Montana Max.
But I'm on vacation since yesterday, so I'll have more time for the next 15 days : I'll try to publish some snapshots from the bonus game (which I am on right now), and I can tell you the levels all load correctly, apart from the animated parts (platforms collapsing, that kind of things).
The big challenge will be Gogo's wheel, because the characters are numerous and require more colors than the game boy color normally can show at once, but I have a plan.
Oh, and I'm anticipating the trailer a lot this time, because this will require some work, but I think you might like it very much!
Thank you for your patience.