A fair effort
As far as "escape from the room" games go, this one wasn't too bad, but it was very easy. I can't fully undersatnd why you would have drawn that all by hand first, as it would be easily replicated on MS Paint, but never-the-less.
Instead of "revamping" this one, I would suggest starting anew. Your ideas are not at all bad, but it seems as though you may be in need of some other sort of inspiration. Try having a dead end or two. Try having an inventory of more than one slot. Try adding a timer with a consequence added to it.
Keep on submitting, you definitely have potential.