First off, don't use the .ips format for patches. SMWCentral no longer permits that in their hack entries, since it does not account for the header which will solve some issues with patching to headered/unheadered roms.
The title screen still has the sounds of Mario moving. Consider putting in your own title screen movement files to prevent the sounds from disrupting the music.
The text "Luigi and the Final Year" only appears in the fade-in and when you start the menu.
Consider using event paths on the overworld. It will make players less confused about where they can go, and give them mystery as where they should go.
The status bar is quite bland, as it's merely the default with Luigi replaced with the HP counter. Consider using a tool like SMWSBE to edit it, and creating a custom font to fit with everything else.
No sound when Luigi dies from losing all his HP.
On fadeouts, sometimes Luigi just moves without animation, making him look like he's gliding.
It is possible to make Luigi's HP go to 11 if he takes a mushroom at 9HP.
The ocean looks bland. Consider placing rocks in the sea or other objects to break up the pattern.
Now I get to the part of the review that requires screenshots. It is here:
I stopped playing at Temporal Jungle. All in all, it's a solid hack and while I didn't have enough time to play with the rest, it looks like it will work out pretty well and I hope my feedback assists you in looking at the rest of the hack.
Check out my romhack in development, Super Dazran World!