Hello Tom, thanks for playing and for the kind words!
The game is actually fully complete if you play "Shooty and the Catfish: Fully Reloaded". That version contains remakes of Episodes 1 and 2 with overhauled visuals as well as 3 additional episodes.
There are still a lot of healing stations in the final game but some of the late-game weapons are pretty expensive so you can always sell the herbs to buy ammo. ;)