A free program for Android, by Kostas Nakos.
What is Colleen?
It is an official port of the Atari 8-bit home computer series, which includes the 400, 800, XL, and XE series. It is based on the open-source project, which allows you to build your own system from the ground up.
The software is free, so you can download it and start playing right away.
How does Colleen work?
You will be able to choose between the hardware and the software versions of the game. If you want to play in hardware, you will need a hardware emulated device. The best option for you is the one you have. If you don't have an Android device, you can download the software version and play it in your computer.
If you want to play in the software version, you will need to install the game and start it. You will be able to select the speed of the game, the sound, and the music.
