After some previous not-published testing the waters of IntyBASIC, I came up with a concept that I believe I can turn into a playable game.
The game is called Alligator Swamp, and is to a great deal based on the Commodore PET game Alligator Moeras which also exists in a coloured version for the C64. You play a small monkey jumping in the tree collecting coconuts. You will move up and down automatically, and steer the monkey to the left and right, so on each lap you will hit the water. In the original game, you have a limited numer of pieces of the water line to touch. One you go through the water, the alligator comes to eat you!
My variation will include turtles a'la Turtle Bridge. Those may dive/disappear all of a sudden, but on the other hand are not in limited supply. The exact design of the game display is not yet finished, and if anyone likes, I'd gladly accept help with the graphics.