Ammer follows mouse, space to regular fire, and F to launch a homing arrow, gets five per level, if you don't know how to buy upgrades, I'm disapointed.
Need $17175 moneyos to get all reload speed upgrades for guy. Need $6600 for platform upgrades. The things that attack you from the ground are zombies, and from the air are flappers, along with a few other bosses and things. Yes, things attack from the air, they start apring at level 13 and up. Their attack is like poison breath that they shot at from a distance.