Played the game until the sign with red color with End written on it.
Still have a lot of works to do.
For the starter level, it is better to have a tutorial level, to understand the control and the game mechanism, especially when climbing using the shark teeth (btw, nice use of shark teeth for climbing ;))
Also some sound and music would be nice especially to boost the mood.
Resizable screen will be also nice especially for player with lower screen resolution. It is easy to enable it in Game Maker Studio.
About the Sharky's design, it looks like a whale instead of shark. Maybe if you sharp the top head a bit and add more white color above its mouth to the near top of its head, it will do :).
About the distribution, I personally prefer Standalone instead of Installer. It's a bit hassle to move folders if I want to test between Standalone and Installed games, especially if I want to play/test many games.
Also, good luck for the update in the future C:.