For example, in Super Mario 64 DS you need to keep Y pressed to run.
Doing that and jumping at the same time is really difficult in a touchscreen, so I'd like a feature to keep a button pressed automatically.
[Feature Request] Keep a button pressed
Re: [Feature Request] Keep a button pressed
This is one of the reasons the devs included lua support. To be able to create custom control scripts for individual games that have odd quirks due to not being on real hardware.