Yep, thank you Dissi, values were strings

Ah, never mind, I just forgot to make parseInt(x) before passing value to this function

Documentation sais, that there're 2 types of Room.lookForAt() method, but one of them doesn't work:
* Room.lookForAt(type, target) - works well
* Room.lookForAt(type, x, y) - throws error "TypeError: Cannot read property 'undefined' of undefined"

Is there any other, more robust problems reporting channel?
I hope to see a github repo soon to submit issues there