This is the Linux version of Dosbox configured for Jetpack. Just run jetpack.sh and you should be fine.
Jetpack was an immediate hit when it was released in 1993, and a cult following grew internationally. I received a ton of mail and submissions by people creating their own jetpack levels. The built in level editor is one of the most popular features - over 1000 levels have been created. Some teachers bought Jetpack because they considered the editor to be educational, encouraging their students' creativity. Jetpack was the top selling game for both publishers that carried it (Software Creations and Impulse Games). Jetpack runs fine on an 8086, and surprisingly well on today's computers!