For all those who want to set a Highscore of some kind:
Upon switching weapons the reload-timer is resetted, meaning if you'd press 100times per second key "1" (while holding the left mouse key), you would shoot 100 bullets per second, pushing your damage per second far beyond then what is reachable with the normal automatic gun =).
Time to find somewhat of a macro engine =P
Besides that i like the concept that you can't simply camp in one corner and await the hordes, as this won't generate income. Having a different "shooting-sound" for every weapon was impressing =P
However, what i didn't like was the fact you'd have to buy every single level of a weapon, unlike saving up for the 2000 pistol right away. What the point of showing the higher-level-price if you can't buy it anyways, even if you had the money?
Sure, you got continous growth, but maybe you should implement an experience system for weapon upgrades, and money as secondary upgrade currency for "fancy" character upgrades, like, running speed, jump height etc. as its getting very monotonous by haing to buy 1 upgrade at a time.
Maybe it is getting introduced later in the game, but i was hoping for something like a "competetive"-feature in this game, like sharing scores on facebook or similar...