P5 Golf
Some resources:
https://gamedev.stackexchange.com/questions/1589/when-should-i-use-a-fixed-or-variable-time-step
https://www.myphysicslab.com/develop/docs/Engine2D.html https://www.myphysicslab.com/engine2D/rigid-body-en.html
https://www.myphysicslab.com/engine2D/collision-methods-en.html
https://gafferongames.com/post/integration_basics/ https://gafferongames.com/post/fix_your_timestep/