I've hit a bug on "Waves - Order Still Matters!" where the graph is affected by zoom and object positions. Sorry about the short report, but it's really hard to explain, it just happens.
It's so hard to explain, but I loved the game so much I'll download a screen recording tool to show what's going on. Will edit as soon as I get the video captured.
EDIT: Downloaded the worst video capture tool but here it is:
- Default state, zooming in and out: http://i.imgur.com/N34bRcS.gif You can see spikyness and the graph changing with zoom.
- Default function, changing x's scale: http://i.imgur.com/LQ99RY7.gif This does not make sense at all.
- Sledding with x scaled to 7: http://i.imgur.com/9QukafO.gif The graph changes over time.
Can you decouple rendering from simulation? I guess so, since it's easy to test whether a point lies below or above the curve. If at least what was simulated were reliable that level would be (somewhat) playable.
I would suggest having reliable visual sampling too (samples in absolute space, growing in number with zoom out), but I'm not aware of the actual performance implications.
I still think there's something else going on besides sampling error. Why is it (visually) working correctly for x*7 until I sled? Why does it change so dramatically over time?