Getting into a 2D section and not being able to make any precise jumps because the levels don't factor in the actual physics is pretty bad to me.Really? Forces' level design ain't exactly good but mainly because it doesn't have much substance. The level design in Heroes and Shadow meanwhile can be incredibly frustrating.
Unless you were doing one of the awful missions in Heroes or Shadow, they're at least more engaging than anything in Forces. Lacking substance is the biggest flaw you can have in a series that is almost designed around replayability.