Pac-Man Transcode is the result of an 8-month effort by Glen Hewlett to transcode the assembly-language routines of Pac-Man to a Radio Shack Color Computer 3 (Coco3). The process of experimentation, improvement, and ultimate success has been covered in his blog starting with this entry.
Currently, working with this in-browser emulation is a little non-intuitive and difficult. Helpful instructions:
When the screen boots, enter RUN"PACMAN"
Please note: The " (quotes) character is SHIFT-2.
The loading screen will show a large pac-man and a bar along the bottom for progress, and then say "DECOMPRESSING". The title screen will then appear.
At the title screen, use the arrow keys to change controls from "JOYSTICK" (the default) to "KEYBOARD", or you can't use the arrow keys during the game.
After making any selections, press SPACE to start the game up (with system check and attract mode).
Press 5 to insert a coin. Press 1 or 2 to start a one or two-player game.
A or Z will scroll the screen up or down, if automatic scroll isn't selected