I had fun, it might seem unpolished but the idea of opening the door and having to press the sword makes it a fun reflexed-based game :D 

It’s good that I saw the previous comment. Does make me wonder whether (SPOILER) I’d have found the sword on my own volition.

It’s a decent enough premise! It’s just that, since the not-monster requires no other action, you only have to think ‘if there’s something red behind the door I click the weapon’ – which makes it a little too easy. Also it dumps the player back to the start after they’ve won, but this is almost the same as a game over (which shows ‘oops’ or ‘ouch’).

The arrows hovering over the door when selected are a nice touch though.

Neat little game, cute sprites too. I wasn't sure how to actually win at first until I realized the sword was a button