or button "W" - run up
or button "S" - run down
or button "A" - run left
or button "D" - run right
button "SHIFT" - input firing tower
button "ALT" - input trap tower
button "P" - pause
button "M" - mute sounds
Blue crystals - increasing count hero lifes and adding 10000 to score
Green crystals - increasing bullets speed and adding 2000 to score
Red crystals - killing all enemies and adding 5000 to score