You actually get the best ending just by having 100 morale at the end, and as far as I can tell 15 is the highest stat you need for any given morale choice to work. Morale is gained or lost based on if the relevant stat is high enough when you try something, not from making the right choice.
In the first couple minutes I rated 1 star because of just how absurd the entire premise is. But by the end some of the jokes were actually landing and the story turned out to be pretty decent. I'd say that's worth one or two more.
World building is nice and all but holy hell you can't just keep dumping gibberish on the player as if they know what you're talking about. This is why a lot of stories introduce a newcomer for the others to explain everything to.
earth+water=swamp, fire+air=energy, energy+swamp=life, earth+fire=lava, lava+water=stone, stone+water=sand, sand+life=seeds, seeds+earth=tree, tree+fire=ash, ash+life=ghost, life+swamp=bacteria, life+stone=egg, egg+swamp=lizard, lizard+earth=beast, beast+life=human, this will get you ten categories.
The best way to make your buddy happy is either to spray him into the corner with a firehose, or to turn on low grav, earthquake, and drop in some bouncy balls.
For new players, putting red silicon on yellow makes it flow unless any of the red is powered, yellow on red makes it only flow if all the yellow is. That's basically all you really need to get started.