Projectile simulation

Test simulator deployment with projectile simulation, running on custom Sprig firmware ('Grips') and as a desktop simulator application for Windows, Linux, and MacOS (I haven't tested it on MacOS).

W - Increase launch speed
S - Decrease launch speed
D - Move right
A - Move left

I - Increase launch angle
K - Decrease launch angle
L - Launch projectile
J - Reset simulation (remove all masses, return to origin)

Sprig version tends to not like very large numbers of projectiles (>75?). Try pressing J to reset if it gets too slow.