I've made a lot of progress since yesterday, both conceptually and in unity. I have a partially fleshed out the idea for the game now.

Essentially, it's a Platformer in which there's a little brainless creature that wanders towards the goal. It would fall and die many times if not for the player, who drops planks of wood and healing potions omnisciently (and hopefully more stuff), to help the creature pass the level.

This is a great idea! I never seen something similar before. You can also add more items to be dropped, for example a jump platform which makes the character to jump or a stop sign which makes him to reverse.