Not sure about the upward/downward animation. Right now it's somewhere on the list between all the stuff that should happen someday, but not now. xD
Ooh right, the billboards in the jungle level. Actually there are two separate jungle stages. One with 3 lanes and with the billboards/construction site and one with only 2 lanes, without the billboards. The one in the Turbo OutRun mode is the one with 2 lanes. The one with 3 lanes is in the Original mode. Maybe I should add the billboards in the 2 lanes stage as well. I didn't do that before because originally both stages were featured in the Original mode, before v0.4.
Yeah, it's a memorable corner, because of that reason. xD I crash there too sometimes.