I didn't spend much time making this mod and I don't regularly make mods so this won't be the best.
However it is currently the best green goo mod avalible (because it's the only one).
The mod includes craftable armour, green goo lakes, a craftable sword and a smeltable portal lighter.
If you make it to the green goo dimention (which can be done by creating a portal similar to the nether portal but with green goo grass and lighting it with a lighter found by smelting a bucket of green goo) you will find goo monsters. If you defeat one you will be rewarded with a powerful multi-tool that can one shot most mobs, and break blocks instaintly.