Yea, you could get a similar experience (for some definition of similar) with Pico-8 which is also a constrained system.

Even better, the creator supports educators super cheap

https://www.lexaloffle.com/pico-8.php?page=schools

Yea, it's not custom hardware, but you can share your creations with everyone since it runs on Web, Mac, Windows, Linux, Android, iOS and there are lots of cheaper devices that will run it if you want a handheld.

Also mentioning Lexaloffle’s most recent project the Picotron which is a fantasy workstation instead of just a console.

https://www.lexaloffle.com/picotron.php

With no technical upper limit on file size (as well as being able to export for other OSes) you could, in theory, publish a full game from this.