sorry this is unrelated but i believe this is the only place i can comment, so i have all the upgrades, and i got to the final floor presumably, but how the *BLEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEP* do i defeat the final boss? theres nothing that implies a method to beat him.
Without spoiling it, here's a hint: In the floor where you encounter the final boss, explore the level thoroughly. You will find something, or rather somethings. They're not small by any means so don't worry about having to pixel hunt. You'll know what it is when you see them, and you'll know what to do with them when you do.