The movement pace in Kirka is a bit slower than other games of the same genre: make sure to keep that in mind to move strategically and beat your enemies! You won't be able to jump around quickly: your best bet is to aim as good as possible and fire your weapon. Use your knife to walk a bit faster and switch back to your main weapon to engage in a fight. One other option is to dash to confuse your enemy and making yourself harder to hit, but use it wisely because there is a cooldown. Another trick is to crouch while shooting to make yourself harder to hit.
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