Mighty Mike

Mighty Mike not only has source code available, but both
the original and shareware releases have debug symbols.

Debug Keys

• Pressing N while either clicking the mouse (in Power Pete)
  or pressing Period (in Mighty Mike) to skip to the next map.
• On the title screen, holding the left mouse button down on the main menu
  while pressing 1 through 5 will teleport the player
  to the corresponding world.
• To record a demo, press R and E on the title screen.
  There was also supposed to be demo playback done by pressing P and L at the same time.

Power Pete

When the game was initially released, it was retitled
from Mighty Mike due to trademark concerns. It also had a more
restricted view and had interlaced mode available for slower 68k Mac users.