Added achievements to the game. (The total count is 9 for the time being, but I plan on adding more and changing a few of them)

Revamped the keybindings menu with a better look and functionality.

Changed the way settings menu functions. (changes are not saved until you close the menu, which I could use to add a "discard" button and such in the future)

The entire sound system is rewritten.

• Lesser memory leaks should happen (I guess)

• Sounds inside the game are positioned correctly (e.g. an explosion from the right side actually sounds like it's coming from the right)

• Distant sounds are less silent.

• (It's a bit rough around the edges, but does the job for now)

Fixed an issue regarding script loads in scene & map switches (Not exactly a seen issue, but fixing this finally lets me package the game into an APK!)

The unused buttons in the main menu now appear gray.