urgent help on very small unity 3d task

i need to complete this in less than 10 hrs I want to develop a simple game of 2 levels. -start menu - first level ( third person character - unity chan ) / First level (she needs to collect items for his house) and have these items in an inventory, also there are spiders following her to hurt her, so there should be health and damage. There are some items when she want to collect she will have some sort of puzzle in order to have the item - second level has a maze where there are some items in there she has to collect and the same spiders then her house will be there she can enter the house and place the items she collected - an exit button And please I need the game not to be complex in order to understand it and can present it Thank you Here is a file containing the story bible and some screen shots of the game I started and the hight concept document.