Wow, well done! You're the first one to get there.
There is no map sadly, I had no time to create that. All upgrades are there but some of them are behind hidden pathways. One hidden heart is in the tundra, one pair of lungs is in the water section of the coast and the last lair has one of each upgrade, each one hidden. If you want, you can get all the way back to the beginning from the final boss and get them but it might be troublesome as the area isn't designed for backtracking.