Up - W Button
Left - A Button
Down - S Button
Right - D Button
Upon encountering a gun, touch it to equip it and left click to shoot.
There's a limited number of bullets, but you may find ammunition lying around, touch them to add more bullets.
Upon encountering a portal, touch it to teleport to the next level of the labyrinth.
Upon touching a yellow potion, your character will be unable to move for a few seconds.
The blind creatures will attack you if you touch them, 2 attacks and you're out.
Shoot them to destroy them.