QOL Update #2

Hey hello everyone! today we have another Quality of life update!
Allowing more kinds of input

Changelist:

• added a keybind option at the level select screen
• keybind modes: wasd, mouse, numpad, and something i called "wasd split"
  • wasd/numpad mode is mostly self explanaining
  • wasd split mode allows for both wasd and numpad to be used
  • mouse mode enables the use of a mouse to hit nodes
• Updated the graphics of the game world (calculator)