If the app crashes on startup, freezes on the loading screen, or fails to save levels, use these proven fixes.
If the game fails to launch, try clearing the app's cache or checking for at least 2 GB of free internal storage .
The 4.0.0 engine has redesigned input handling. If your Bluetooth controller (Xbox, PS4, 8BitDo) is unresponsive:
This is a recurring concern. The engine uses . It is a clean-room reimplementation using custom C++ and OpenGL. However, the default asset pack distributed with some downloads includes copyrighted sprites and sounds from Nintendo.