Besides the shooting, you can use power-ups that make your cannon stronger.
http://miweii.com/forum.php?mod=viewthr ... 032&extra=
http://qrfonline.qrfmag.com/qrfswap/vie ... p?t=155456
http://forum3.bandingklub.cz/viewtopic. ... &t=1627615
http://www.prepody.ru/topic67269.html
http://qrfonline.qrfmag.com/qrfswap/vie ... p?t=147434
http://kiteonly12.free.fr/viewtopic.php?f=6&t=41564
http://telegramguide.org/thread-3014-1-1.html
https://ufr-2020.front5.picapo.net/foru ... pid=572824
http://forum.bandingklub.cz/viewtopic.p ... &t=1682753
https://forum.pcfoster.pl/topic/107766- ... en-online/