That's possible. I've been learning different systems lately - out of pure curiosity in my free time. The Coleco is a very similar machine from what I can see.
I have added a selection of controls on the start screen - UP Cursor selects the Keyboard (CURSORS + SPACE to Jumping) and DOWN Cursor selects JOY 1 + FIRE A Jumping).
I changed the game engine a bit, this time I used the MegaROM ASC16 mapper (I don't know if everything was done correctly). The game uses uncompressed full TileMaps.
On some emulators the game crashes when I go down the game map, e.g. on Emulicious (on others it seems to work fine).
