A Mini Adventure Contest held recently produced a treasure trove of one-room wonders. The Trap
by Dex is a short game that won't take too long to solve, plus there are hints on the site if you're stuck.
Quest for the Cookie is pretty alright as well. Window size for the most of the entries cannot be changed, unfortunately. Worth a try for the sake of novelty. Click on show games, then Mini Adventures to access all efforts.
Name: The Trap