Start with the simple checks.
When a game will not install, launch, or stay stable, changing one thing at a time makes the cause much easier to identify.
1. Restart and check storage
Restart the device and confirm that there is enough free storage. Temporary system issues and low storage can interfere with installations and normal application behavior.
2. Check the installation source
If an installation fails, verify that the package is complete and intended for the device. An incomplete or incompatible package can fail before the application ever starts.
3. Check what changed
If the game worked previously, identify what changed immediately before the problem appeared. A system update, application update, storage issue, or new package can provide an important clue.
Write down the message or describe exactly what happens.
Test a single troubleshooting step before trying another.
Open the game again and compare the result.
Crashes or freezing
Check available storage, device compatibility, background applications, and recent software changes. If the issue started after an update, note the version before attempting unrelated fixes.
Still not working?
Keep the diagnosis focused. The Block Blast troubleshooting guide provides another reference for common problems.
If the issue is specifically related to installation, see the installation failed guide.