You can also access through the actual itch page of the game too. But here's the information also:

Mobile:
Directional buttons to move.
B or A to attack.
Top red button changes directional button layout.
Top gray button is select.
Bottom gray button is start.
Bottom red bottom goes to menu.

Web browser:
Directional keys to move.
Z or X to attack.
Enter is start button.
Shift is select button.

NOTE: On the mobile/web browser version, the music/sfx will not start until you click/tap the screen. Once you do the music/sfx will start, but lag behind. Go to the menu (ESC button or top red button) and reset the game. Then it'll be back to normal. Also the screams in this version are little off on the emulator and sound a little garbled.