Alright, nice game!
I am world champigon! =D
Quite fun, I like this type of games in a sheet of paper and guns, etc... this kind of art is fun. Still, you should add more things to personalize this, more upgrades.. a little bit more speed or intensity and that's all.. you got an addictin game
I like this kind of art style, its simple, repetitive gameplay is actually kind of addicting hehe
They gameplay is a bit slow and I didnt feel like it picked up any pace either during the 5-6 levels that I played. The lack of music was a bit boring also :( And also like in most of these games you are underpowered when the enemies comes from either above or beneth you since the path towards you is shorter.
Liked the graphic, felt a bit oldschool. I remember I used to do drawings with canons defending oncoming forces and such
Add some more upgrades, Multiple upgrades (spread shot, laser, rockets etc maybe.)
Add a progress bar, so you can see how far youve gotten on the level.
Else, Good game and keep it coming!