Thank you so much for this feedback!
We indeed thought of letting the player throw items to distract the baddie but set it to the stretch goals and as it turned out, we didn't have time to implement it ^^
Also, we had many debates about whether the boss was easy enough to lose or not but I guess as the person who programmed the IA I should have agreed to change some things because it didn't seem too hard to me. Sorry for that! I think the fact that he can hear you walking above him in the last level is tough too, we could have isolated the floors.
It makes us proud to get comments like yours, thanks again!