It seems to be less of the game and more that Neneko's speed just slows down to a crawl. Try saving/loading, jumping, attacking, just doing a variety of things to reset it, it worked for me--though if your case is actual slow frames, it likely won't for you.
Viewing post in Down the Neko Hole 0.24 comments
an attack fixes that
still, for me the game goes pretty slow on browser
and talking to others can be a bother, pressing shift skips it completely but it also makes it open the special keys menu on my computer lol and pressing x skips stuff but at a slow pace, there is no button for making the dialog go fast that doesnt skip it
and the default controls are unintuitive, specially as a right handed person