Keyboard only tag is at -26 points, and this is a keyboard only game (a game that can be played with just the keyboard) it can be played with only the mouse too, but they are not exclusive.
I would love to have a keyboard shortcut to send a new wave of enemies... it's a vital part of the strategy for me.
About speed button, I don't think I've needed much, this game keeps you playing all the time
it's very easy to cheat when you have predetermined input :( the problem is not in cheating, is in the probability of designing a machine that doesn't work in all cases. I disagree that it's difficult to program random inputs! it's very easy to solve this kind of problems with modern computer languages! It should be easy to create a random input test!
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