Spline/visual update (post-GMTK Game Jam 2023)

Improvements to the functionality with the spline system. In the game jam build, the minion spline attaching code was completely broken; now works great, but still needs improvement with where the mouse directs the minions. Major updates to the graphics fidelity, more sounds, and music. Added additional spline road with twirling/looping curves, as well as a transition between the splines.

The game still does not contain an end game, victory or fail-state. It is still in active development.