New levels and lag fixes

I started polishing early levels and bugs in hope of releasing the current demo to steam, but I figured I'd want it more polished and thought out, so it will take more time until I release it.

-Added 2 new levels in the first biome. I also tweaked some early levels for a better learning experience.

-Changed the way the chest works with collisions for better lag handling. This has caused quite a few bugs that i'm currently working on.

-Fixed a rare bug where the chest could be stuck in a ceiling if picked from right under it.

-Changed the nautilus' ink breath animation to improve performance in levels they were used a lot.

I'll be working on updating the game's trailer next.