So I just added a few things here and there. Small changes to make it feel better. Also added a little warning in the readme to keep code a bit cleaner. I was a little confused of how everything was setup but you can pick it up pretty quickly.

This is it so far!

Rules:

• When it's your turn, you may only add one piece of code (movement, weapons, etc.), and modify one piece of code (bug fixes, polishing, etc.)
• When you pass the code you must write what you did in the credits at the end of this file and the game, if someone decides to add it to the game (use your reddit username) and write what you did.
• When you finish your turn, please submit to /r/gamemaker asking who wants to pass the code next with a copy of the COMPILED game.
• Please do NOT distribute the source code, if you want to show people the game, please compile it first.
• When the game comes to 30 devs, instead of putting the game onto reddit, please PM the save at /u/Oke_oku so (s)he can determine wether or not it's ready to release.

Who ever wants it first will get the source. I have passed it to /u/TL_games.

The original post. The previous post.