If your emulated Linux version runs slowly, close background Android apps and lower the resolution inside your VNC viewer.
GB Studio was created by Chris Maltby as a visual game creator that requires no coding. It was built for Windows, macOS, and Linux. The story began with a desire to make real Game Boy ROMs (.gb files) easily. However, as mobile gaming exploded, the community began asking: "Can I make these games on my phone?" The Workaround: Web-Based Creation gb studio android
Use tools like Winlator to run the Windows version of GB Studio on your Android device. Note that the UI may be difficult to manage on smaller screens. If your emulated Linux version runs slowly, close