LÖVE

This is for a school project that I need to do if anyone can help that would be great.
**I am a noob**
I am using some... I mean allot of Goature's code and states system
I have a few problems.
1. I want to add a texture to my player (I'm talking about his platformer tutorials)
2. I want to make it when my player gets to a certain part of the map it would warp him to the next one.
3. I need a back function in the states system.
** I know I'm asking allot but stick with me **
4. I need enemies and a boss battle.
5. A points system.

My general suggestion, as I read your questions: Try reading more tutorials and practice programming a bit. Most things can be implemented and are not very difficult.
Also, have a look in the wiki, there are general tutorials: https://www.love2d.org/wiki/Main_Page

That said, here is an answer to problem number 1:
In the draw code substitute this: by this: Additionally you have to define the image you want to draw. For that, please read this wiki page and look at the examples:
https://www.love2d.org/wiki/love.graphics.draw