Idk why but for some reason i got a .apk file instead, i downloaded this again today and it worked fine, it was a fun game, 3 things though.
1. Change the when
space key is typed to a while key is pressed and place the shot part in the begin slot, leave the other during and end slot empty, this will make it so if you spam the space key it wont keep firing for a long time but stop when you stop hitting the spacebar.
2. Maybe add a different gun like a side arm, or one you get if you get a killstreak with out getting hit by a zombie.
3. add a forcefield at the edge of the map, by 'pulling' yourself towards spawn or something.
Other than that it was a great game, fun and had nice graphics!