To prevent crashes, try turning off high-end graphics like shadows and light effects in the game settings. If running on Android 4.4 or newer, try using a model png file (More Settings Advanced) instead of the native one. This will also make the game look better. (Currently not compatible with Huawei devices.) We are looking into lower quality models for older devices.
Please note that this game is only available for tablets with 2 GB of RAM or more.