I unfortunately couldn't get the character to move at all. I tried WASD with caps lock off and on, even tried numlock to see if that was somehow an issue. I restarted Chrome. I tried it in Edge. Tried in fullscreen. Nothing would let me move the mermaid; I sent the game to a friend and they couldn't get her to move either.
I gave high marks in Theme and Aesthetics, but unfortunately had to give low marks on User Experience. I'm quite confused because other people have obviously been able to play it, according to the comments. Did you make any changes to the game after submitting it?