Edit: Coupon extended to July 31.
This handheld game console was quite popular in a previous deal and now it's on sale from GeekBuying with free priority shipping. The design is inspired by the Gameboy with all the essential buttons like a dpad, vibration feedback, as well dual joysticks, triggers on the rear and a 3.5" IPS touchscreen. When it comes to gaming this can handle everything up to PS1 games really well, PSP games run pretty good with the stock firmware, while Dreamcast, Saturn and PS2 are more of a struggle.
For the operating system it runs Android 11 and can boot into Abernic's custom Linux OS on the microSD card. It supports custom firmware like JELOS that offers better game performance for some platforms. It has dual microSD card slots, two USB-C ports, HDMI out, 3.5mm audio jack, single speaker, WiFi ac 2.4G/5G, Bluetooth 4.2 and a 3200mAh battery offering up to 6 hours of playtime.
Retro Game Corps has an indepth video review and Retro Dodo a shorter review.
- Apply coupon NNNAURG353V at checkout
AU$ based on current Mastercard rate and stacks with cashback
I have this, kind of - I have the RG353P which is the same internals but different layout - Horizontal over vertical.
Lots of people will tell you it can handle N64 well but I've tried everything - Various linux firmwares & the stock android, and haven't had close to smooth performance in most of the games people will be playing (MK64, Diddy Kong Racing, Perfect Dark, Conkers etc). Everything Ps1 and below runs pretty flawlessly.
If you're interested in getting a cheaper model that doesn't include the control sticks and lacks Wifi, the RG35XX is similar form factor and newer and can also handle up to PS1.
If you get this I strongly recommend using JelOS as the OP describes.