The original flash file can still be found as flyguy dot swf. These alternate titles for the .swf are pretty accurate descriptions.
N.I.'s free java games and the Merlin’s Revenge series are my favorite. And the Ponta series and Area Flat 1-3, which may also have been N.I., I can’t remember. I used to know dozens of online games but one by one they all became unplayable.
A list of essential browser games must include Hungry Pumkin (which I never before realized had that spelling). (And which won’t even start until you select the right-click Play option.)
Edit: What a terrible preview image and description.
The dearly departed Flashbang Studios also made Minotaur China Shop, which is unquestionably the game I have played and enjoyed most while seriously intoxicated.