An egg hatches in the middle of the forest, a small, strange, gooey monster was in it...
This game is like @Qunriz
's cookie game, except... you have to feed the monster stuff, or put stuff on him, or make him swim in something? Whatever you want to do, and I'll tell you the result of such action.
Mod: A monster hatches!
P1: Feed it rock
Mod: Its shell hardens, and it becomes less slime-y
P2: I make it swim in chemicals
Mod: It gets the ability to shock everything around it
P3: I will let thunder strike it
Mod: It loses the shocking ability, but becomes much bigger and stronger