HW_2 Grading Scheme

Shot direction/power selector work properly
  - appropriate gradiation of direction (5)
  - appropriate range of power (5)
  - "real-time" power selection, e.g., not dials or sliders (10)

Ball rolls properly on flat tiles
  - rolling friction works (10)
  - ball exits/enters flat tiles properly (10)

Ball rolls properly on sloped tiles
  - parabolic motion (10)
  - ball stops and falls backwards on a sloped tile (10)

Edges work properly
  - non-horizontal, non-vertical edges works (5)
  - edges on flat tiles work (5)
  - edges on sloped tiles work (10)

Gameplay?
  - ball falls into cup (5)
  - must go slower if farther from center of cup (5)
  - lip out works (5)

Rendering speed is appropriate (5)