clicking was the first thing i thought of, and it does appear to cause issues if you click anywhere once youre in the game proper (sorry unacceptably bad for multitasking). i managed to get it running on firefox though a different browser couldnt hurt our chances (im not sure)
it also depends on if you got the background images or if it was a black background, i developed it with somewhat obtuse controls but you should get changes to the background pressing A or D too, W>Spacebar or S>Spacebar are the intended "solutions" so you could see if that gets the pipes moving (i assume you wouldve gotten this if smth didnt break, my b, might patch click thing later tonight)
lmk if that does the trick!