As all self-respect grannies, you have a Glock 18 which was gifted to you by your beloved grandson. You daily use it to most efficiently propel yourself to a hospital past deadly turrets with guns and rockets.
But be careful, your bullets can return to you.

-time is ticking and your health is deteriorating fast.
-collect pills to prolong your health
-be aware of deadly walls
-ice takes control from you and lava literally burns you if you not fast enough

Good luck!