Definitely a good game with some serious potential. I would get started on a sequal and fix some issues and add some more content.
few noteables mentioned already, cant get rid of soliders or buildings, game gets extremely easy after a certain point. I actually forgot I left the game on and it finished itself out and I didnt even get touched.
the weapons were nice. add some variety in there. like crossbows and frickin lazer beams.
boss battles?
more level variety. just the same islands and background with a different layout.
once again, great game, just needs more to it.