Okay, now at least we know that the problems is not with unity engine :D I still have no idea where this problem is coming from though, so please answer these questions:
1- What were you doing in the game when it crashed??
2- Does it crash even when you’re doing nothing?? (Is it random??)
3- Does it crash without internet connection??
4- Does it crash on the lowest quality settings and with the “effects” option disabled??
5- Do you have any unity game other than solar smash?? Do they crash as well??