Hi, I'm not sure why the camera moved so fast for you because it was fine for me. Were you stuck at the left and the player wasn't moving forward in the camera?
If so, I'll definitely work on that! Currently, the player will eventually move from the left side of the camera, but it might take some time for him to speed up.
If you meant the right, yes, Endless Mode is meant to be harder, with acceleration increasing over time, making stopping before obstacles much harder.