Now that DraStic (Nintendo DS) official support has been added to Onion OS, with version 4.3.0, check the expected performance of your favourite games at the linked compatibility list.
The official release of version 4.3.0 has finally arrived. Featuring much anticipated support for the DraStic Nintendo DS emulator. There's also support for the new 560p screens of the Miyoo Mini v4 and lots of bug fixes.
"This is an introduction to Onion Desktop Tools. Onion Desktop Tools is a Windows program that simplifies the preparation of a micro SD card for Onion..."
As with other home computers, the ZX Spectrum came with a built-in keyboard and could use an optional joystick. This gave game designers manifold options when it came to their chosen control scheme....
First of all, get yourself a reliable micro SD card. See Do I need to replace the SD card I received with my retro handheld? for some recommendations....