I'm really happy the tutorial was okay! I was worried it was getting too convoluted so I tried simplifying as best I can. I also considered the poofs, along with falling leaves as details, though I was worried particles were gonna affect performance too heavily in web builds (but I can definitely experiment with different ways to do it! I really like the idea of smoke where the fox was, to indicate that it vanished purposefully 💨)
also it's definitely not just you, the teleportation mechanic overall is pretty simple right now (i was struggling really bad with it :'D skill issue on my part) It basically always teleports behind the player. I'm experimenting with abit more randomized teleporting now, though.
but again thank you so much for taking the time to play and report the issue!