Booger Bungee (Windows 3.1, Derek Yu/Blackeye Software, 1998)
Yes, Derek "Spelunky" Yu. This year marks this game's 25th anniversary! You can play it in your browser here. The instructions are here. Read the fifth bullet point in this post from Derek to learn a possible reason for making an entire game out of a single Earthworm Jim level.
Tip: after emulation starts, be patient, then click the emulated desktop to gain focus and drag the windows into proper view and change their layering order as needed.














