I've had some fun solving very simple problems in brainfuck. This would be an interesting choice for a programming game because how simple it is. You can learn

I've had some fun solving very simple problems in brainfuck. This would be an interesting choice for a programming game because how simple it is. You can learn it in like 5 minutes. And also it's very easy to visualize the state. You can watch the program move around the tape and increment and decrement cells. Try it yourself, write a program to reverse an input string.