How about working on some of those shooting skills?
Description from Big Fish:
A secret research base has been invaded by evil zombies, who are now threatening the entire world!
Wipe out the zombie threat as you take part in a great battle to rescue humanity in Zombie Shooter.
Blast your way through this fun Shooter, as you upgrade your weapons and navigate through an infested laboratory.
Destroy the menace to protect the planet from this overwhelming threat.
Discover the cause of the zombie infestation and save Earth!
Warning: Contains graphic images.
Sampler: play it free for an hour.