fix: stop accidental 'ghosting' effect when creature is right next to… … player Signed-off-by: deadprogram <ron@hybridgroup.com>

docs: add actual example code to README Signed-off-by: deadprogram <ron@hybridgroup.com>

docs: add some additional GoDoc comments Signed-off-by: deadprogram <ron@hybridgroup.com>

player: switch to using dpad for movement instead of buttons Signed-off-by: deadprogram <ron@hybridgroup.com>

docs: correct README info in examples Signed-off-by: deadprogram <ron@hybridgroup.com>